Initial Import

1 files changed, 386 insertions, 0 deletions

diff --git a/system/helpers/text_helper.php b/system/helpers/text_helper.php
new file mode 100644
index 000000000..15b5573bf
--- /dev/null
+++ b/system/helpers/text_helper.php
@@ -0,0 +1,386 @@
+<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * Code Igniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		Rick Ellis
+ * @copyright	Copyright (c) 2006, pMachine, Inc.
+ * @license		http://www.codeignitor.com/user_guide/license.html 
+ * @link		http://www.codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+ 
+// ------------------------------------------------------------------------
+
+/**
+ * Code Igniter Text Helpers
+ *
+ * @package		CodeIgniter
+ * @subpackage	Helpers
+ * @category	Helpers
+ * @author		Rick Ellis
+ * @link		http://www.codeigniter.com/user_guide/helpers/text_helper.html
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Word Limiter
+ *
+ * Limits a string to X number of words.
+ *
+ * @access	public
+ * @param	string
+ * @param	integer
+ * @param	string	the end character. Usually an ellipsis 
+ * @return	string
+ */	
+function word_limiter($str, $n = 100, $end_char = '&#8230;')
+{
+	if (strlen($str) < $n) 
+	{
+		return $str;
+	}
+	
+	$words = explode(' ', preg_replace("/\s+/", ' ', preg_replace("/(\r\n|\r|\n)/", " ", $str)));
+	
+	if (count($words) <= $n)
+	{
+		return $str;
+	}
+			
+	$str = '';
+	for ($i = 0; $i < $n; $i++) 
+	{
+		$str .= $words[$i].' ';
+	}
+
+	return trim($str).$end_char; 
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Character Limiter
+ *
+ * Limits the string based on the character count.  Preserves complete words
+ * so the character count may not be exactly as specified.
+ *
+ * @access	public
+ * @param	string
+ * @param	integer
+ * @param	string	the end character. Usually an ellipsis 
+ * @return	string
+ */	
+function character_limiter($str, $n = 500, $end_char = '&#8230;')
+{
+	if (strlen($str) < $n) 
+	{
+		return $str;
+	}
+		
+	$str = preg_replace("/\s+/", ' ', preg_replace("/(\r\n|\r|\n)/", " ", $str));
+
+	if (strlen($str) <= $n)
+	{
+		return $str;
+	}
+									
+	$out = "";
+	foreach (explode(' ', trim($str)) as $val)
+	{
+		$out .= $val.' ';			
+		if (strlen($out) >= $n)
+		{
+			return trim($out).$end_char; 
+		}		
+	}
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * High ASCII to Entities
+ *
+ * Converts High ascii text and MS Word special characters to character entities
+ *
+ * @access	public
+ * @param	string
+ * @return	string
+ */	
+function ascii_to_entities($str)
+{
+   $count	= 1;
+   $out	= '';
+   $temp	= array();
+	   
+   for ($i = 0, $s = strlen($str); $i < $s; $i++)
+   {
+	   $ordinal = ord($str[$i]);
+	   
+	   if ($ordinal < 128)
+	   {
+		   $out .= $str[$i];            
+	   }
+	   else
+	   {
+		   if (count($temp) == 0)
+		   {
+			   $count = ($ordinal < 224) ? 2 : 3;
+		   }
+		   
+		   $temp[] = $ordinal;
+		   
+		   if (count($temp) == $count)
+		   {
+			   $number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64);
+
+			   $out .= '&#'.$number.';';
+			   $count = 1;
+			   $temp = array();
+		   }   
+	   }   
+   }
+   
+   return $out;
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Entities to ASCII
+ *
+ * Converts character entities back to ASCII
+ *
+ * @access	public
+ * @param	string
+ * @param	bool
+ * @return	string
+ */	
+function entities_to_ascii($str, $all = TRUE)
+{
+   if (preg_match_all('/\&#(\d+)\;/', $str, $matches))
+   {
+	   for ($i = 0, $s = count($matches['0']); $i < $s; $i++)
+	   {				
+		   $digits = $matches['1'][$i];
+
+		   $out = '';
+   
+		   if ($digits < 128)
+		   {
+			   $out .= chr($digits);
+		   
+		   } 
+		   elseif ($digits < 2048)
+		   {
+			   $out .= chr(192 + (($digits - ($digits % 64)) / 64));
+			   $out .= chr(128 + ($digits % 64));
+		   } 
+		   else
+		   {
+			   $out .= chr(224 + (($digits - ($digits % 4096)) / 4096));
+			   $out .= chr(128 + ((($digits % 4096) - ($digits % 64)) / 64));
+			   $out .= chr(128 + ($digits % 64));
+		   }
+   
+		   $str = str_replace($matches['0'][$i], $out, $str);				
+	   }
+   }
+   
+   if ($all)
+   {
+	   $str = str_replace(array("&amp;", "&lt;", "&gt;", "&quot;", "&apos;", "&#45;"),
+						  array("&","<",">","\"", "'", "-"),
+						  $str);
+   }
+   
+   return $str;
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Word Censoring Function
+ *
+ * Supply a string and an array of disallowed words and any
+ * matched words will be converted to #### or to the replacement
+ * word you've submitted.
+ *
+ * @access	public
+ * @param	string	the text string
+ * @param	string	the array of censoered words
+ * @param	string	the optional replacement value
+ * @return	string
+ */	
+function word_censor($str, $censored, $replacement = '')
+{
+	if ( ! is_array($censored))
+	{
+		return $str;
+	}
+
+	$str = ' '.$str.' ';
+	foreach ($censored as $badword)
+	{
+		if ($replacement != '')
+		{
+			$str = preg_replace("/\b(".str_replace('\*', '\w*?', preg_quote($badword)).")\b/i", $replacement, $str);
+		}
+		else
+		{
+			$str = preg_replace("/\b(".str_replace('\*', '\w*?', preg_quote($badword)).")\b/ie", "str_repeat('#', strlen('\\1'))", $str);
+		}
+	}
+	
+	return trim($str);
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Code Highlighter
+ *
+ * Colorizes code strings
+ *
+ * @access	public
+ * @param	string	the text string
+ * @return	string
+ */	
+function highlight_code($str)
+{		
+	// The highlight string function encodes and highlights 
+	// brackets so we need them to start raw 
+	$str = str_replace(array('&lt;', '&gt;'), array('<', '>'), $str);
+	
+	// Replace any existing PHP tags to temporary markers so they don't accidentally
+	// break the string out of PHP, and thus, thwart the highlighting.
+	
+	$str = str_replace(array('&lt;?php', '?&gt;',  '\\'), array('phptagopen', 'phptagclose', 'backslashtmp'), $str);
+		
+	// The highlight_string function requires that the text be surrounded
+	// by PHP tags.  Since we don't know if A) the submitted text has PHP tags,
+	// or B) whether the PHP tags enclose the entire string, we will add our
+	// own PHP tags around the string along with some markers to make replacement easier later
+	
+	$str = '<?php //tempstart'."\n".$str.'//tempend ?>'; // <?
+	
+	// All the magic happens here, baby!
+	$str = highlight_string($str, TRUE);
+
+	// Prior to PHP 5, the highlight function used icky font tags
+	// so we'll replace them with span tags.	
+	if (abs(phpversion()) < 5)
+	{
+		$str = str_replace(array('<font ', '</font>'), array('<span ', '</span>'), $str);
+		$str = preg_replace('#color="(.*?)"#', 'style="color: \\1"', $str);
+	}
+	
+	// Remove our artificially added PHP
+	$str = preg_replace("#\<code\>.+?//tempstart\<br />\</span\>#is", "<code>\n", $str);
+	$str = preg_replace("#\<code\>.+?//tempstart\<br />#is", "<code>\n", $str);
+	$str = preg_replace("#//tempend.+#is", "</span>\n</code>", $str);
+	
+	// Replace our markers back to PHP tags.
+	$str = str_replace(array('phptagopen', 'phptagclose', 'backslashtmp'), array('&lt;?php', '?&gt;', '\\'), $str); //<?
+				
+	return $str;
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Phrase Highlighter
+ *
+ * Highlights a phrase within a text string
+ *
+ * @access	public
+ * @param	string	the text string
+ * @param	string	the phrase you'd like to highlight
+ * @param	string	the openging tag to precede the phrase with
+ * @param	string	the closing tag to end the phrase with
+ * @return	string
+ */	
+function highlight_phrase($str, $phrase, $tag_open = '<strong>', $tag_close = '</strong>')
+{
+	if ($str == '')
+	{
+		return '';
+	}
+	
+	if ($phrase != '')
+	{
+		return preg_replace('/('.preg_quote($phrase).')/i', $tag_open."\\1".$tag_close, $str);
+	}
+
+	return $str;
+}
+	
+// ------------------------------------------------------------------------
+
+/**
+ * Word Wrap
+ *
+ * Wraps text at the specified character.  Maintains the integrity of words.
+ *
+ * @access	public
+ * @param	string	the text string
+ * @param	integer	the number of characters to wrap at
+ * @return	string
+ */	
+function word_wrap($str, $chars = '76')
+{	
+	if ( ! ctype_digit($chars))
+		$chars = 76;
+	
+	$str = preg_replace("/(\r\n|\r|\n)/", "\n", $str);
+	$lines = split("\n", $str);
+	
+	$output = "";
+	while (list(, $thisline) = each($lines)) 
+	{
+		if (strlen($thisline) > $chars)
+		{
+			$line = "";
+			$words = split(" ", $thisline);
+			while(list(, $thisword) = each($words)) 
+			{
+				while((strlen($thisword)) > $chars) 
+				{
+					$cur_pos = 0;
+					for($i=0; $i < $chars - 1; $i++)
+					{
+						$output .= $thisword[$i];
+						$cur_pos++;
+					}
+					
+					$output .= "\n";
+					$thisword = substr($thisword, $cur_pos, (strlen($thisword) - $cur_pos));
+				}
+				
+				if ((strlen($line) + strlen($thisword)) > $chars) 
+				{
+					$output .= $line."\n";
+					$line = $thisword." ";
+				} 
+				else 
+				{
+					$line .= $thisword." ";
+				}
+			}
+
+			$output .= $line."\n";
+		} 
+		else 
+		{
+			$output .= $thisline."\n";
+		}
+	}
+
+	return $output;	
+}
+
+?>
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