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<?php
/* For licensing terms, see /license.txt */
/**
* This is the text library for Chamilo.
* It is loaded during the global initialization,
* so the functions below are available everywhere.
*/
define('EXERCISE_NUMBER_OF_DECIMALS', 2);
/* XML processing functions */
// A regular expression for accessing declared encoding within xml-formatted text.
// Published by Steve Minutillo,
// http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss/
define('_PCRE_XML_ENCODING', '/<\?xml.*encoding=[\'"](.*?)[\'"].*\?>/m');
/**
* This function strips all html-tags found in the input string and outputs a pure text.
* Mostly, the function is to be used before language or encoding detection of the input string.
*
* @param string $string the input string with html-tags to be converted to plain text
*
* @return string the returned plain text as a result
*/
function api_html_to_text($string)
{
// These purifications have been found experimentally, for nice looking output.
$string = preg_replace('/<br[^>]*>/i', "\n", $string);
$string = preg_replace('/<\/?(div|p|h[1-6]|table|ol|ul|blockquote)[^>]*>/i', "\n", $string);
$string = preg_replace('/<\/(tr|li)[^>]*>/i', "\n", $string);
$string = preg_replace('/<\/(td|th)[^>]*>/i', "\t", $string);
$string = strip_tags($string);
// Line endings unification and cleaning.
$string = str_replace(["\r\n", "\n\r", "\r"], "\n", $string);
$string = preg_replace('/\s*\n/', "\n", $string);
$string = preg_replace('/\n+/', "\n", $string);
return trim($string);
}
/**
* Detects encoding of html-formatted text.
*
* @param string $string the input html-formatted text
*
* @return string returns the detected encoding
*/
function api_detect_encoding_html($string)
{
if (@preg_match('/<head.*(<meta[^>]*content=[^>]*>).*<\/head>/si', $string, $matches)) {
if (@preg_match('/<meta[^>]*charset=(.*)["\';][^>]*>/si', $matches[1], $matches)) {
return api_refine_encoding_id(trim($matches[1]));
}
}
return api_detect_encoding(api_html_to_text($string));
}
/**
* Converts the text of a html-document to a given encoding, the meta-tag is changed accordingly.
*
* @param string $string the input full-html document
* @param string the new encoding value to be set
*/
function api_set_encoding_html(&$string, $encoding)
{
$old_encoding = api_detect_encoding_html($string);
if (@preg_match('/(.*<head.*)(<meta[^>]*content=[^>]*>)(.*<\/head>.*)/si', $string, $matches)) {
$meta = $matches[2];
if (@preg_match("/(<meta[^>]*charset=)(.*)([\"';][^>]*>)/si", $meta, $matches1)) {
$meta = $matches1[1].$encoding.$matches1[3];
$string = $matches[1].$meta.$matches[3];
} else {
$string = $matches[1].'<meta http-equiv="Content-Type" content="text/html; charset='.$encoding.'"/>'.$matches[3];
}
} else {
$count = 1;
if (strpos('</head>', strtolower($string)) !== false) {
$string = str_ireplace(
'</head>',
'<meta http-equiv="Content-Type" content="text/html; charset='.$encoding.'"/></head>',
$string,
$count
);
} else {
$string = str_ireplace(
'<body>',
'<head><meta http-equiv="Content-Type" content="text/html; charset='.$encoding.'"/></head><body>',
$string,
$count
);
}
}
$string = api_convert_encoding($string, $encoding, $old_encoding);
}
/**
* Returns the title of a html document.
*
* @param string $string the contents of the input document
* @param string $output_encoding The encoding of the retrieved title.
* If the value is not set, the system encoding is assumed.
* @param string $input_encoding The encoding of the input document. If the value is not set, it is detected.
*
* @return string the retrieved title, html-entities and extra-whitespace between the words are cleaned
*/
function api_get_title_html(&$string, $output_encoding = null, $input_encoding = null)
{
if (@preg_match('/<head.+<title[^>]*>(.*)<\/title>/msi', $string, $matches)) {
if (empty($output_encoding)) {
$output_encoding = api_get_system_encoding();
}
if (empty($input_encoding)) {
$input_encoding = api_detect_encoding_html($string);
}
return trim(
@preg_replace(
'/\s+/',
' ',
api_html_entity_decode(
api_convert_encoding($matches[1], $output_encoding, $input_encoding),
ENT_QUOTES,
$output_encoding
)
)
);
}
return '';
}
/**
* Detects encoding of xml-formatted text.
*
* @param string $string the input xml-formatted text
* @param string $default_encoding This is the default encoding to be returned
* if there is no way the xml-text's encoding to be detected.
* If it not spesified, the system encoding is assumed then.
*
* @return string returns the detected encoding
*
* @todo The second parameter is to be eliminated. See api_detect_encoding_html().
*/
function api_detect_encoding_xml($string, $default_encoding = null)
{
if (preg_match(_PCRE_XML_ENCODING, $string, $matches)) {
return api_refine_encoding_id($matches[1]);
}
if (api_is_valid_utf8($string)) {
return 'UTF-8';
}
if (empty($default_encoding)) {
$default_encoding = _api_mb_internal_encoding();
}
return api_refine_encoding_id($default_encoding);
}
/**
* Converts character encoding of a xml-formatted text.
* If inside the text the encoding is declared, it is modified accordingly.
*
* @param string $string the text being converted
* @param string $to_encoding the encoding that text is being converted to
* @param string $from_encoding (optional) The encoding that text is being converted from.
* If it is omited, it is tried to be detected then.
*
* @return string returns the converted xml-text
*/
function api_convert_encoding_xml($string, $to_encoding, $from_encoding = null)
{
return _api_convert_encoding_xml($string, $to_encoding, $from_encoding);
}
/**
* Converts character encoding of a xml-formatted text into UTF-8.
* If inside the text the encoding is declared, it is set to UTF-8.
*
* @param string $string the text being converted
* @param string $from_encoding (optional) The encoding that text is being converted from.
* If it is omited, it is tried to be detected then.
*
* @return string returns the converted xml-text
*/
function api_utf8_encode_xml($string, $from_encoding = null)
{
return _api_convert_encoding_xml($string, 'UTF-8', $from_encoding);
}
/**
* Converts character encoding of a xml-formatted text from UTF-8 into a specified encoding.
* If inside the text the encoding is declared, it is modified accordingly.
*
* @param string $string the text being converted
* @param string $to_encoding (optional) The encoding that text is being converted to.
* If it is omitted, the platform character set is assumed.
*
* @return string returns the converted xml-text
*/
function api_utf8_decode_xml($string, $to_encoding = 'UTF-8')
{
return _api_convert_encoding_xml($string, $to_encoding, 'UTF-8');
}
/**
* Converts character encoding of a xml-formatted text.
* If inside the text the encoding is declared, it is modified accordingly.
*
* @param string $string the text being converted
* @param string $to_encoding the encoding that text is being converted to
* @param string $from_encoding (optional) The encoding that text is being converted from.
* If the value is empty, it is tried to be detected then.
*
* @return string returns the converted xml-text
*/
function _api_convert_encoding_xml(&$string, $to_encoding, $from_encoding)
{
if (empty($from_encoding)) {
$from_encoding = api_detect_encoding_xml($string);
}
$to_encoding = api_refine_encoding_id($to_encoding);
if (!preg_match('/<\?xml.*\?>/m', $string, $matches)) {
return api_convert_encoding(
'<?xml version="1.0" encoding="'.$to_encoding.'"?>'."\n".$string,
$to_encoding,
$from_encoding
);
}
if (!preg_match(_PCRE_XML_ENCODING, $string)) {
if (strpos($matches[0], 'standalone') !== false) {
// The encoding option should precede the standalone option,
// othewise DOMDocument fails to load the document.
$replace = str_replace('standalone', ' encoding="'.$to_encoding.'" standalone', $matches[0]);
} else {
$replace = str_replace('?>', ' encoding="'.$to_encoding.'"?>', $matches[0]);
}
return api_convert_encoding(str_replace($matches[0], $replace, $string), $to_encoding, $from_encoding);
}
global $_api_encoding;
$_api_encoding = api_refine_encoding_id($to_encoding);
return api_convert_encoding(
preg_replace_callback(
_PCRE_XML_ENCODING,
'_api_convert_encoding_xml_callback',
$string
),
$to_encoding,
$from_encoding
);
}
/**
* A callback for serving the function _api_convert_encoding_xml().
*
* @param array $matches input array of matches corresponding to the xml-declaration
*
* @return string returns the xml-declaration with modified encoding
*/
function _api_convert_encoding_xml_callback($matches)
{
global $_api_encoding;
return str_replace($matches[1], $_api_encoding, $matches[0]);
}
/* Functions for supporting ASCIIMathML mathematical formulas and ASCIIsvg maathematical graphics */
/**
* Dectects ASCIIMathML formula presence within a given html text.
*
* @param string $html the input html text
*
* @return bool returns TRUE when there is a formula found or FALSE otherwise
*/
function api_contains_asciimathml($html)
{
if (!preg_match_all('/<span[^>]*class\s*=\s*[\'"](.*?)[\'"][^>]*>/mi', $html, $matches)) {
return false;
}
foreach ($matches[1] as $string) {
$string = ' '.str_replace(',', ' ', $string).' ';
if (preg_match('/\sAM\s/m', $string)) {
return true;
}
}
return false;
}
/**
* Dectects ASCIIsvg graphics presence within a given html text.
*
* @param string $html the input html text
*
* @return bool returns TRUE when there is a graph found or FALSE otherwise
*/
function api_contains_asciisvg($html)
{
if (!preg_match_all('/<embed([^>]*?)>/mi', $html, $matches)) {
return false;
}
foreach ($matches[1] as $string) {
$string = ' '.str_replace(',', ' ', $string).' ';
if (preg_match('/sscr\s*=\s*[\'"](.*?)[\'"]/m', $string)) {
return true;
}
}
return false;
}
/**
* Convers a string from camel case into underscore.
* Works correctly with ASCII strings only, implementation for human-language strings is not necessary.
*
* @param string $string The input string (ASCII)
*
* @return string The converted result string
*/
function api_camel_case_to_underscore($string)
{
return strtolower(preg_replace('/([a-z])([A-Z])/', "$1_$2", $string));
}
/**
* Converts a string with underscores into camel case.
* Works correctly with ASCII strings only, implementation for human-language strings is not necessary.
*
* @param string $string The input string (ASCII)
* @param bool $capitalise_first_char (optional)
* If true (default), the function capitalises the first char in the result string
*
* @return string The converted result string
*/
function api_underscore_to_camel_case($string, $capitalise_first_char = true)
{
if ($capitalise_first_char) {
$string = ucfirst($string);
}
return preg_replace_callback('/_([a-z])/', '_api_camelize', $string);
}
// A function for internal use, only for this library.
function _api_camelize($match)
{
return strtoupper($match[1]);
}
/**
* Truncates a string.
*
* @author Brouckaert Olivier
*
* @param string $text the text to truncate
* @param int $length The approximate desired length. The length of the suffix below is to be added to
* have the total length of the result string.
* @param string $suffix a suffix to be added as a replacement
* @param string $encoding (optional) The encoding to be used. If it is omitted,
* the platform character set will be used by default.
* @param bool $middle if this parameter is true, truncation is done in the middle of the string
*
* @return string truncated string, decorated with the given suffix (replacement)
*/
function api_trunc_str($text, $length = 30, $suffix = '...', $middle = false, $encoding = null)
{
if (empty($encoding)) {
$encoding = api_get_system_encoding();
}
$text_length = api_strlen($text, $encoding);
if ($text_length <= $length) {
return $text;
}
if ($middle) {
return rtrim(
api_substr(
$text,
0,
round($length / 2),
$encoding
)
).
$suffix.
ltrim(
api_substr(
$text,
-round($length / 2),
$text_length,
$encoding
)
);
}
return rtrim(api_substr($text, 0, $length, $encoding)).$suffix;
}
/**
* Handling simple and double apostrofe in order that strings be stored properly in database.
*
* @author Denes Nagy
*
* @param string variable - the variable to be revised
*
* @return string
*/
function domesticate($input)
{
$input = str_replace(["'", '"'], "''", stripslashes($input));
return $input;
}
/**
* @author Rewritten by Nathan Codding - Feb 6, 2001.
* completed by Hugues Peeters - July 22, 2002
*
* Actually this function is taken from the PHP BB 1.4 script
* - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking
* to that URL
* - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking
* to http://www.xxxx.yyyy[/zzzz]
* - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking
* to that email address
* - Only matches these 2 patterns either after a space, or at the beginning of a line
*
* Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe
* have it require something like xxxx@yyyy.zzzz or such. We'll see.
*/
/**
* Callback to convert URI match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}.
*
* @since Wordpress 2.3.2
*
* @param array $matches single Regex Match
*
* @return string HTML A element with URI address
*/
function _make_url_clickable_cb($matches)
{
$url = $matches[2];
if (')' == $matches[3] && strpos($url, '(')) {
// If the trailing character is a closing parethesis, and the URL has an opening
// parenthesis in it, add the closing parenthesis to the URL.
// Then we can let the parenthesis balancer do its thing below.
$url .= $matches[3];
$suffix = '';
} else {
$suffix = $matches[3];
}
// Include parentheses in the URL only if paired
while (substr_count($url, '(') < substr_count($url, ')')) {
$suffix = strrchr($url, ')').$suffix;
$url = substr($url, 0, strrpos($url, ')'));
}
$url = esc_url($url);
if (empty($url)) {
return $matches[0];
}
return $matches[1]."<a href=\"$url\" rel=\"nofollow\">$url</a>".$suffix;
}
/**
* Checks and cleans a URL.
*
* A number of characters are removed from the URL. If the URL is for displaying
* (the default behaviour) ampersands are also replaced. The 'clean_url' filter
* is applied to the returned cleaned URL.
*
* @since wordpress 2.8.0
*
* @uses \wp_kses_bad_protocol() To only permit protocols in the URL set
* via $protocols or the common ones set in the function.
*
* @param string $url the URL to be cleaned
* @param array $protocols Optional. An array of acceptable protocols.
* Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher',
* 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn' if not set.
* @param string $_context Private. Use esc_url_raw() for database usage.
*
* @return string the cleaned $url after the 'clean_url' filter is applied
*/
function esc_url($url, $protocols = null, $_context = 'display')
{
//$original_url = $url;
if ('' == $url) {
return $url;
}
$url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);
$strip = ['%0d', '%0a', '%0D', '%0A'];
$url = _deep_replace($strip, $url);
$url = str_replace(';//', '://', $url);
/* If the URL doesn't appear to contain a scheme, we
* presume it needs http:// appended (unless a relative
* link starting with /, # or ? or a php file).
*/
if (strpos($url, ':') === false && !in_array($url[0], ['/', '#', '?']) &&
!preg_match('/^[a-z0-9-]+?\.php/i', $url)) {
$url = 'http://'.$url;
}
return Security::remove_XSS($url);
}
/**
* Perform a deep string replace operation to ensure the values in $search are no longer present.
*
* Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values
* e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that
* str_replace would return
*
* @since wordpress 2.8.1
*
* @param string|array $search The value being searched for, otherwise known as the needle.
* An array may be used to designate multiple needles.
* @param string $subject the string being searched and replaced on, otherwise known as the haystack
*
* @return string the string with the replaced svalues
*/
function _deep_replace($search, $subject)
{
$subject = (string) $subject;
$count = 1;
while ($count) {
$subject = str_replace($search, '', $subject, $count);
}
return $subject;
}
/**
* Callback to convert URL match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}.
*
* @since wordpress 2.3.2
*
* @param array $matches single Regex Match
*
* @return string HTML A element with URL address
*/
function _make_web_ftp_clickable_cb($matches)
{
$ret = '';
$dest = $matches[2];
$dest = 'http://'.$dest;
$dest = esc_url($dest);
if (empty($dest)) {
return $matches[0];
}
// removed trailing [.,;:)] from URL
if (in_array(substr($dest, -1), ['.', ',', ';', ':', ')']) === true) {
$ret = substr($dest, -1);
$dest = substr($dest, 0, strlen($dest) - 1);
}
return $matches[1]."<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret";
}
/**
* Callback to convert email address match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}.
*
* @since wordpress 2.3.2
*
* @param array $matches single Regex Match
*
* @return string HTML A element with email address
*/
function _make_email_clickable_cb($matches)
{
$email = $matches[2].'@'.$matches[3];
return $matches[1]."<a href=\"mailto:$email\">$email</a>";
}
/**
* Convert plaintext URI to HTML links.
*
* Converts URI, www and ftp, and email addresses. Finishes by fixing links
* within links.
*
* @since wordpress 0.71
*
* @param string $text content to convert URIs
*
* @return string content with converted URIs
*/
function make_clickable($text)
{
$r = '';
// split out HTML tags
$textarr = preg_split('/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$nested_code_pre = 0; // Keep track of how many levels link is nested inside <pre> or <code>
foreach ($textarr as $piece) {
if (preg_match('|^<code[\s>]|i', $piece) || preg_match('|^<pre[\s>]|i', $piece)) {
$nested_code_pre++;
} elseif (('</code>' === strtolower($piece) || '</pre>' === strtolower($piece)) && $nested_code_pre) {
$nested_code_pre--;
}
if ($nested_code_pre ||
empty($piece) ||
($piece[0] === '<' && !preg_match('|^<\s*[\w]{1,20}+://|', $piece))
) {
$r .= $piece;
continue;
}
// Long strings might contain expensive edge cases ...
if (10000 < strlen($piece)) {
// ... break it up
foreach (_split_str_by_whitespace($piece, 2100) as $chunk) {
// 2100: Extra room for scheme and leading and trailing paretheses
if (2101 < strlen($chunk)) {
$r .= $chunk; // Too big, no whitespace: bail.
} else {
$r .= make_clickable($chunk);
}
}
} else {
$ret = " $piece "; // Pad with whitespace to simplify the regexes
$url_clickable = '~
([\\s(<.,;:!?]) # 1: Leading whitespace, or punctuation
( # 2: URL
[\\w]{1,20}+:// # Scheme and hier-part prefix
(?=\S{1,2000}\s) # Limit to URLs less than about 2000 characters long
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+ # Non-punctuation URL character
(?: # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
[\'.,;:!?)] # Punctuation URL character
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
)*
)
(\)?) # 3: Trailing closing parenthesis (for parethesis balancing post processing)
~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
// Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
$ret = preg_replace_callback($url_clickable, '_make_url_clickable_cb', $ret);
$ret = preg_replace_callback(
'#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is',
'_make_web_ftp_clickable_cb',
$ret
);
$ret = preg_replace_callback(
'#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i',
'_make_email_clickable_cb',
$ret
);
$ret = substr($ret, 1, -1); // Remove our whitespace padding.
$r .= $ret;
}
}
// Cleanup of accidental links within links
$r = preg_replace('#(<a([ \r\n\t]+[^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r);
return $r;
}
/**
* Breaks a string into chunks by splitting at whitespace characters.
* The length of each returned chunk is as close to the specified length goal as possible,
* with the caveat that each chunk includes its trailing delimiter.
* Chunks longer than the goal are guaranteed to not have any inner whitespace.
*
* Joining the returned chunks with empty delimiters reconstructs the input string losslessly.
*
* Input string must have no null characters (or eventual transformations on output chunks
* must not care about null characters)
*
* <code>
* _split_str_by_whitespace( "1234 67890 1234 67890a cd 1234 890 123456789 1234567890a 45678 1 3 5 7 90 ", 10 ) ==
* array (
* 0 => '1234 67890 ', // 11 characters: Perfect split
* 1 => '1234 ', // 5 characters: '1234 67890a' was too long
* 2 => '67890a cd ', // 10 characters: '67890a cd 1234' was too long
* 3 => '1234 890 ', // 11 characters: Perfect split
* 4 => '123456789 ', // 10 characters: '123456789 1234567890a' was too long
* 5 => '1234567890a ', // 12 characters: Too long, but no inner whitespace on which to split
* 6 => ' 45678 ', // 11 characters: Perfect split
* 7 => '1 3 5 7 9', // 9 characters: End of $string
* );
* </code>
*
* @since wordpress 3.4.0
*
* @param string $string the string to split
* @param int $goal the desired chunk length
*
* @return array numeric array of chunks
*/
function _split_str_by_whitespace($string, $goal)
{
$chunks = [];
$string_nullspace = strtr($string, "\r\n\t\v\f ", "\000\000\000\000\000\000");
while ($goal < strlen($string_nullspace)) {
$pos = strrpos(substr($string_nullspace, 0, $goal + 1), "\000");
if (false === $pos) {
$pos = strpos($string_nullspace, "\000", $goal + 1);
if (false === $pos) {
break;
}
}
$chunks[] = substr($string, 0, $pos + 1);
$string = substr($string, $pos + 1);
$string_nullspace = substr($string_nullspace, $pos + 1);
}
if ($string) {
$chunks[] = $string;
}
return $chunks;
}
/**
* This functions cuts a paragraph
* i.e cut('Merry Xmas from Lima',13) = "Merry Xmas fr...".
*
* @param string The text to "cut"
* @param int Count of chars
* @param bool Whether to embed in a <span title="...">...</span>
*
* @return string
* */
function cut($text, $maxchar, $embed = false)
{
if (api_strlen($text) > $maxchar) {
if ($embed) {
return '<p title="'.$text.'">'.api_substr($text, 0, $maxchar).'...</p>';
}
return api_substr($text, 0, $maxchar).' ...';
}
return $text;
}
/**
* Show a number as only integers if no decimals, but will show 2 decimals if exist.
*
* @param mixed Number to convert
* @param int Decimal points 0=never, 1=if needed, 2=always
* @param string $decimalPoint
* @param string $thousandsSeparator
*
* @return mixed An integer or a float depends on the parameter
*/
function float_format($number, $flag = 1, $decimalPoint = '.', $thousandsSeparator = ',')
{
$flag = (int) $flag;
if (is_numeric($number)) {
if (!$number) {
$result = $flag === 2 ? '0.'.str_repeat('0', EXERCISE_NUMBER_OF_DECIMALS) : '0';
} else {
if (floor($number) == $number) {
$result = number_format(
$number,
$flag === 2 ? EXERCISE_NUMBER_OF_DECIMALS : 0,
$decimalPoint,
$thousandsSeparator
);
} else {
$result = number_format(
round($number, 2),
$flag === 0 ? 0 : EXERCISE_NUMBER_OF_DECIMALS,
$decimalPoint,
$thousandsSeparator
);
}
}
return $result;
}
}
// TODO: To be checked for correct timezone management.
/**
* Function to obtain last week timestamps.
*
* @return array Times for every day inside week
*/
function get_last_week()
{
$week = date('W');
$year = date('Y');
$lastweek = $week - 1;
if ($lastweek == 0) {
$week = 52;
$year--;
}
$lastweek = sprintf("%02d", $lastweek);
$arrdays = [];
for ($i = 1; $i <= 7; $i++) {
$arrdays[] = strtotime("$year"."W$lastweek"."$i");
}
return $arrdays;
}
/**
* Gets the week from a day.
*
* @param string Date in UTC (2010-01-01 12:12:12)
*
* @return int Returns an integer with the week number of the year
*/
function get_week_from_day($date)
{
if (!empty($date)) {
$time = api_strtotime($date, 'UTC');
return date('W', $time);
}
return date('W');
}
/**
* This function splits the string into words and then joins them back together again one by one.
* Example: "Test example of a long string"
* substrwords(5) = Test ... *.
*
* @param string
* @param int the max number of character
* @param string how the string will be end
*
* @return a reduce string
*/
function substrwords($text, $maxchar, $end = '...')
{
if (strlen($text) > $maxchar) {
$words = explode(" ", $text);
$output = '';
$i = 0;
while (1) {
$length = (strlen($output) + strlen($words[$i]));
if ($length > $maxchar) {
break;
} else {
$output = $output." ".$words[$i];
$i++;
}
}
} else {
$output = $text;
return $output;
}
return $output.$end;
}
function implode_with_key($glue, $array)
{
if (!empty($array)) {
$string = '';
foreach ($array as $key => $value) {
if (empty($value)) {
$value = 'null';
}
$string .= $key." : ".$value." $glue ";
}
return $string;
}
return '';
}
/**
* Transform the file size in a human readable format.
*
* @param int $file_size Size of the file in bytes
*
* @return string A human readable representation of the file size
*/
function format_file_size($file_size)
{
$file_size = (int) $file_size;
if ($file_size >= 1073741824) {
$file_size = (round($file_size / 1073741824 * 100) / 100).'G';
} elseif ($file_size >= 1048576) {
$file_size = (round($file_size / 1048576 * 100) / 100).'M';
} elseif ($file_size >= 1024) {
$file_size = (round($file_size / 1024 * 100) / 100).'k';
} else {
$file_size = $file_size.'B';
}
return $file_size;
}
/**
* Converts an string CLEANYO[admin][amann,acostea]
* into an array:.
*
* array(
* CLEANYO
* admin
* amann,acostea
* )
*
* @param $array
*
* @return array
*/
function bracketsToArray($array)
{
return preg_split('/[\[\]]+/', $array, -1, PREG_SPLIT_NO_EMPTY);
}
/**
* @param string $string
* @param bool $capitalizeFirstCharacter
*
* @return mixed
*/
function underScoreToCamelCase($string, $capitalizeFirstCharacter = true)
{
$str = str_replace(' ', '', ucwords(str_replace('_', ' ', $string)));
if (!$capitalizeFirstCharacter) {
$str[0] = strtolower($str[0]);
}
return $str;
}
/**
* @param string $value
*/
function trim_value(&$value)
{
$value = trim($value);
}
/**
* Strips only the given tags in the given HTML string.
*
* @param string $html
* @param array $tags
*
* @return string
*/
function strip_tags_blacklist($html, $tags)
{
foreach ($tags as $tag) {
$regex = '#<\s*'.$tag.'[^>]*>.*?<\s*/\s*'.$tag.'>#msi';
$html = preg_replace($regex, '', $html);
}
return $html;
}
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