--- /dev/null
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * Text helper class.
+ *
+ * $Id: text.php 3769 2008-12-15 00:48:56Z zombor $
+ *
+ * @package Core
+ * @author Kohana Team
+ * @copyright (c) 2007-2008 Kohana Team
+ * @license http://kohanaphp.com/license.html
+ */
+class text_Core {
+
+ /**
+ * Limits a phrase to a given number of words.
+ *
+ * @param string phrase to limit words of
+ * @param integer number of words to limit to
+ * @param string end character or entity
+ * @return string
+ */
+ public static function limit_words($str, $limit = 100, $end_char = NULL)
+ {
+ $limit = (int) $limit;
+ $end_char = ($end_char === NULL) ? '…' : $end_char;
+
+ if (trim($str) === '')
+ return $str;
+
+ if ($limit <= 0)
+ return $end_char;
+
+ preg_match('/^\s*+(?:\S++\s*+){1,'.$limit.'}/u', $str, $matches);
+
+ // Only attach the end character if the matched string is shorter
+ // than the starting string.
+ return rtrim($matches[0]).(strlen($matches[0]) === strlen($str) ? '' : $end_char);
+ }
+
+ /**
+ * Limits a phrase to a given number of characters.
+ *
+ * @param string phrase to limit characters of
+ * @param integer number of characters to limit to
+ * @param string end character or entity
+ * @param boolean enable or disable the preservation of words while limiting
+ * @return string
+ */
+ public static function limit_chars($str, $limit = 100, $end_char = NULL, $preserve_words = FALSE)
+ {
+ $end_char = ($end_char === NULL) ? '…' : $end_char;
+
+ $limit = (int) $limit;
+
+ if (trim($str) === '' OR utf8::strlen($str) <= $limit)
+ return $str;
+
+ if ($limit <= 0)
+ return $end_char;
+
+ if ($preserve_words == FALSE)
+ {
+ return rtrim(utf8::substr($str, 0, $limit)).$end_char;
+ }
+
+ preg_match('/^.{'.($limit - 1).'}\S*/us', $str, $matches);
+
+ return rtrim($matches[0]).(strlen($matches[0]) == strlen($str) ? '' : $end_char);
+ }
+
+ /**
+ * Alternates between two or more strings.
+ *
+ * @param string strings to alternate between
+ * @return string
+ */
+ public static function alternate()
+ {
+ static $i;
+
+ if (func_num_args() === 0)
+ {
+ $i = 0;
+ return '';
+ }
+
+ $args = func_get_args();
+ return $args[($i++ % count($args))];
+ }
+
+ /**
+ * Generates a random string of a given type and length.
+ *
+ * @param string a type of pool, or a string of characters to use as the pool
+ * @param integer length of string to return
+ * @return string
+ *
+ * @tutorial alnum alpha-numeric characters
+ * @tutorial alpha alphabetical characters
+ * @tutorial hexdec hexadecimal characters, 0-9 plus a-f
+ * @tutorial numeric digit characters, 0-9
+ * @tutorial nozero digit characters, 1-9
+ * @tutorial distinct clearly distinct alpha-numeric characters
+ */
+ public static function random($type = 'alnum', $length = 8)
+ {
+ $utf8 = FALSE;
+
+ switch ($type)
+ {
+ case 'alnum':
+ $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+ break;
+ case 'alpha':
+ $pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+ break;
+ case 'hexdec':
+ $pool = '0123456789abcdef';
+ break;
+ case 'numeric':
+ $pool = '0123456789';
+ break;
+ case 'nozero':
+ $pool = '123456789';
+ break;
+ case 'distinct':
+ $pool = '2345679ACDEFHJKLMNPRSTUVWXYZ';
+ break;
+ default:
+ $pool = (string) $type;
+ $utf8 = ! utf8::is_ascii($pool);
+ break;
+ }
+
+ // Split the pool into an array of characters
+ $pool = ($utf8 === TRUE) ? utf8::str_split($pool, 1) : str_split($pool, 1);
+
+ // Largest pool key
+ $max = count($pool) - 1;
+
+ $str = '';
+ for ($i = 0; $i < $length; $i++)
+ {
+ // Select a random character from the pool and add it to the string
+ $str .= $pool[mt_rand(0, $max)];
+ }
+
+ // Make sure alnum strings contain at least one letter and one digit
+ if ($type === 'alnum' AND $length > 1)
+ {
+ if (ctype_alpha($str))
+ {
+ // Add a random digit
+ $str[mt_rand(0, $length - 1)] = chr(mt_rand(48, 57));
+ }
+ elseif (ctype_digit($str))
+ {
+ // Add a random letter
+ $str[mt_rand(0, $length - 1)] = chr(mt_rand(65, 90));
+ }
+ }
+
+ return $str;
+ }
+
+ /**
+ * Reduces multiple slashes in a string to single slashes.
+ *
+ * @param string string to reduce slashes of
+ * @return string
+ */
+ public static function reduce_slashes($str)
+ {
+ return preg_replace('#(?<!:)//+#', '/', $str);
+ }
+
+ /**
+ * Replaces the given words with a string.
+ *
+ * @param string phrase to replace words in
+ * @param array words to replace
+ * @param string replacement string
+ * @param boolean replace words across word boundries (space, period, etc)
+ * @return string
+ */
+ public static function censor($str, $badwords, $replacement = '#', $replace_partial_words = FALSE)
+ {
+ foreach ((array) $badwords as $key => $badword)
+ {
+ $badwords[$key] = str_replace('\*', '\S*?', preg_quote((string) $badword));
+ }
+
+ $regex = '('.implode('|', $badwords).')';
+
+ if ($replace_partial_words == TRUE)
+ {
+ // Just using \b isn't sufficient when we need to replace a badword that already contains word boundaries itself
+ $regex = '(?<=\b|\s|^)'.$regex.'(?=\b|\s|$)';
+ }
+
+ $regex = '!'.$regex.'!ui';
+
+ if (utf8::strlen($replacement) == 1)
+ {
+ $regex .= 'e';
+ return preg_replace($regex, 'str_repeat($replacement, utf8::strlen(\'$1\'))', $str);
+ }
+
+ return preg_replace($regex, $replacement, $str);
+ }
+
+ /**
+ * Finds the text that is similar between a set of words.
+ *
+ * @param array words to find similar text of
+ * @return string
+ */
+ public static function similar(array $words)
+ {
+ // First word is the word to match against
+ $word = current($words);
+
+ for ($i = 0, $max = strlen($word); $i < $max; ++$i)
+ {
+ foreach ($words as $w)
+ {
+ // Once a difference is found, break out of the loops
+ if ( ! isset($w[$i]) OR $w[$i] !== $word[$i])
+ break 2;
+ }
+ }
+
+ // Return the similar text
+ return substr($word, 0, $i);
+ }
+
+ /**
+ * Converts text email addresses and anchors into links.
+ *
+ * @param string text to auto link
+ * @return string
+ */
+ public static function auto_link($text)
+ {
+ // Auto link emails first to prevent problems with "www.domain.com@example.com"
+ return text::auto_link_urls(text::auto_link_emails($text));
+ }
+
+ /**
+ * Converts text anchors into links.
+ *
+ * @param string text to auto link
+ * @return string
+ */
+ public static function auto_link_urls($text)
+ {
+ // Finds all http/https/ftp/ftps links that are not part of an existing html anchor
+ if (preg_match_all('~\b(?<!href="|">)(?:ht|f)tps?://\S+(?:/|\b)~i', $text, $matches))
+ {
+ foreach ($matches[0] as $match)
+ {
+ // Replace each link with an anchor
+ $text = str_replace($match, html::anchor($match), $text);
+ }
+ }
+
+ // Find all naked www.links.com (without http://)
+ if (preg_match_all('~\b(?<!://)www(?:\.[a-z0-9][-a-z0-9]*+)+\.[a-z]{2,6}\b~i', $text, $matches))
+ {
+ foreach ($matches[0] as $match)
+ {
+ // Replace each link with an anchor
+ $text = str_replace($match, html::anchor('http://'.$match, $match), $text);
+ }
+ }
+
+ return $text;
+ }
+
+ /**
+ * Converts text email addresses into links.
+ *
+ * @param string text to auto link
+ * @return string
+ */
+ public static function auto_link_emails($text)
+ {
+ // Finds all email addresses that are not part of an existing html mailto anchor
+ // Note: The "58;" negative lookbehind prevents matching of existing encoded html mailto anchors
+ // The html entity for a colon (:) is : or : or : etc.
+ if (preg_match_all('~\b(?<!href="mailto:|">|58;)(?!\.)[-+_a-z0-9.]++(?<!\.)@(?![-.])[-a-z0-9.]+(?<!\.)\.[a-z]{2,6}\b~i', $text, $matches))
+ {
+ foreach ($matches[0] as $match)
+ {
+ // Replace each email with an encoded mailto
+ $text = str_replace($match, html::mailto($match), $text);
+ }
+ }
+
+ return $text;
+ }
+
+ /**
+ * Automatically applies <p> and <br /> markup to text. Basically nl2br() on steroids.
+ *
+ * @param string subject
+ * @return string
+ */
+ public static function auto_p($str)
+ {
+ // Trim whitespace
+ if (($str = trim($str)) === '')
+ return '';
+
+ // Standardize newlines
+ $str = str_replace(array("\r\n", "\r"), "\n", $str);
+
+ // Trim whitespace on each line
+ $str = preg_replace('~^[ \t]+~m', '', $str);
+ $str = preg_replace('~[ \t]+$~m', '', $str);
+
+ // The following regexes only need to be executed if the string contains html
+ if ($html_found = (strpos($str, '<') !== FALSE))
+ {
+ // Elements that should not be surrounded by p tags
+ $no_p = '(?:p|div|h[1-6r]|ul|ol|li|blockquote|d[dlt]|pre|t[dhr]|t(?:able|body|foot|head)|c(?:aption|olgroup)|form|s(?:elect|tyle)|a(?:ddress|rea)|ma(?:p|th))';
+
+ // Put at least two linebreaks before and after $no_p elements
+ $str = preg_replace('~^<'.$no_p.'[^>]*+>~im', "\n$0", $str);
+ $str = preg_replace('~</'.$no_p.'\s*+>$~im', "$0\n", $str);
+ }
+
+ // Do the <p> magic!
+ $str = '<p>'.trim($str).'</p>';
+ $str = preg_replace('~\n{2,}~', "</p>\n\n<p>", $str);
+
+ // The following regexes only need to be executed if the string contains html
+ if ($html_found !== FALSE)
+ {
+ // Remove p tags around $no_p elements
+ $str = preg_replace('~<p>(?=</?'.$no_p.'[^>]*+>)~i', '', $str);
+ $str = preg_replace('~(</?'.$no_p.'[^>]*+>)</p>~i', '$1', $str);
+ }
+
+ // Convert single linebreaks to <br />
+ $str = preg_replace('~(?<!\n)\n(?!\n)~', "<br />\n", $str);
+
+ return $str;
+ }
+
+ /**
+ * Returns human readable sizes.
+ * @see Based on original functions written by:
+ * @see Aidan Lister: http://aidanlister.com/repos/v/function.size_readable.php
+ * @see Quentin Zervaas: http://www.phpriot.com/d/code/strings/filesize-format/
+ *
+ * @param integer size in bytes
+ * @param string a definitive unit
+ * @param string the return string format
+ * @param boolean whether to use SI prefixes or IEC
+ * @return string
+ */
+ public static function bytes($bytes, $force_unit = NULL, $format = NULL, $si = TRUE)
+ {
+ // Format string
+ $format = ($format === NULL) ? '%01.2f %s' : (string) $format;
+
+ // IEC prefixes (binary)
+ if ($si == FALSE OR strpos($force_unit, 'i') !== FALSE)
+ {
+ $units = array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB');
+ $mod = 1024;
+ }
+ // SI prefixes (decimal)
+ else
+ {
+ $units = array('B', 'kB', 'MB', 'GB', 'TB', 'PB');
+ $mod = 1000;
+ }
+
+ // Determine unit to use
+ if (($power = array_search((string) $force_unit, $units)) === FALSE)
+ {
+ $power = ($bytes > 0) ? floor(log($bytes, $mod)) : 0;
+ }
+
+ return sprintf($format, $bytes / pow($mod, $power), $units[$power]);
+ }
+
+ /**
+ * Prevents widow words by inserting a non-breaking space between the last two words.
+ * @see http://www.shauninman.com/archive/2006/08/22/widont_wordpress_plugin
+ *
+ * @param string string to remove widows from
+ * @return string
+ */
+ public static function widont($str)
+ {
+ $str = rtrim($str);
+ $space = strrpos($str, ' ');
+
+ if ($space !== FALSE)
+ {
+ $str = substr($str, 0, $space).' '.substr($str, $space + 1);
+ }
+
+ return $str;
+ }
+
+} // End text
\ No newline at end of file
projects / speedfreak / blobdiff