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Derek Jones8917af72010-03-05 12:41:45 -0600[diff] [blame]31<td><h1>CodeIgniter User Guide Version 2.0.0</h1></td>
Derek Allard2067d1a2008-11-13 22:59:24 +0000[diff] [blame]32<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
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43<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
44<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
45Text Helper
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58
59<h1>Text Helper</h1>
60
61<p>The Text Helper file contains functions that assist in working with text.</p>
62
63
64<h2>Loading this Helper</h2>
65
66<p>This helper is loaded using the following code:</p>
67<code>$this->load->helper('text');</code>
68
69<p>The following functions are available:</p>
70
71
72<h2>word_limiter()</h2>
73
74<p>Truncates a string to the number of <strong>words</strong> specified. Example:</p>
75
76<code>
77$string = "Here is a nice text string consisting of eleven words.";<br />
78<br />
79$string = word_limiter($string, 4);<br /><br />
80
81// Returns: Here is a nice&#8230;
82</code>
83
84<p>The third parameter is an optional suffix added to the string. By default it adds an ellipsis.</p>
85
86
87<h2>character_limiter()</h2>
88
89<p>Truncates a string to the number of <strong>characters</strong> specified. It maintains the integrity
90of words so the character count may be slightly more or less then what you specify. Example:</p>
91
92<code>
93$string = "Here is a nice text string consisting of eleven words.";<br />
94<br />
95$string = character_limiter($string, 20);<br /><br />
96
97// Returns: Here is a nice text string&#8230;
98</code>
99
100<p>The third parameter is an optional suffix added to the string, if undeclared this helper uses an ellipsis.</p>
101
102
103
104<h2>ascii_to_entities()</h2>
105
106<p>Converts ASCII values to character entities, including high ASCII and MS Word characters that can cause problems when used in a web page,
107so that they can be shown consistently regardless of browser settings or stored reliably in a database.
108There is some dependence on your server's supported character sets, so it may not be 100% reliable in all cases, but for the most
109part it should correctly identify characters outside the normal range (like accented characters). Example:</p>
110
111<code>$string = ascii_to_entities($string);</code>
112
113
114<h2>entities_to_ascii()</h2>
115
116<p>This function does the opposite of the previous one; it turns character entities back into ASCII.</p>
117
Derek Jones1a195922010-03-10 14:22:59 -0600[diff] [blame^]118<h2>convert_accented_characters()</h2>
119
120<p>Transliterates high ASCII characters to low ASCII equivalents, useful when non-English characters need to be used where only standard ASCII characters are safely used, for instance, in URLs.</p>
121
122<code>$string = convert_accented_characters($string);</code>
123
124<p>This function uses a companion config file <dfn>system/application/config/foreign_chars.php</dfn> to define the to and from array for transliteration.</p>
Derek Allard2067d1a2008-11-13 22:59:24 +0000[diff] [blame]125
126<h2>word_censor()</h2>
127
128<p>Enables you to censor words within a text string. The first parameter will contain the original string. The
129second will contain an array of words which you disallow. The third (optional) parameter can contain a replacement value
130for the words. If not specified they are replaced with pound signs: ####. Example:</p>
131
132<code>
133$disallowed = array('darn', 'shucks', 'golly', 'phooey');<br />
134<br />
135$string = word_censor($string, $disallowed, 'Beep!');</code>
136
137
138<h2>highlight_code()</h2>
139
140<p>Colorizes a string of code (PHP, HTML, etc.). Example:</p>
141
142<code>$string = highlight_code($string);</code>
143
144<p>The function uses PHP's highlight_string() function, so the colors used are the ones specified in your php.ini file.</p>
145
146
147<h2>highlight_phrase()</h2>
148
149<p>Will highlight a phrase within a text string. The first parameter will contain the original string, the second will
150contain the phrase you wish to highlight. The third and fourth parameters will contain the opening/closing HTML tags
151you would like the phrase wrapped in. Example:</p>
152
153<code>
154$string = "Here is a nice text string about nothing in particular.";<br />
155<br />
156$string = highlight_phrase($string, "nice text", '&lt;span style="color:#990000">', '&lt;/span>');
157</code>
158
159<p>The above text returns:</p>
160
161<p>Here is a <span style="color:#990000">nice text</span> string about nothing in particular.</p>
162
163
164
165<h2>word_wrap()</h2>
166
167<p>Wraps text at the specified <strong>character</strong> count while maintaining complete words. Example:</p>
168
169<code>$string = "Here is a simple string of text that will help us demonstrate this function.";<br />
170<br />
171echo word_wrap($string, 25);<br />
172<br />
173// Would produce:<br />
174<br />
175Here is a simple string<br />
176of text that will help<br />
177us demonstrate this<br />
178function</code>
179
180
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Derek Jones7f3719f2010-01-05 13:35:37 +0000[diff] [blame]195<p><a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006-2010 &nbsp;&middot;&nbsp; <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
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