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authorJoël Cox <joel@joelcox.nl>2011-10-09 18:39:39 +0200
committerJoël Cox <joel@joelcox.nl>2011-10-09 18:39:39 +0200
commitf4fb1db458fab52d0493ead52c9ea7e01206eaa7 (patch)
treec549600f342f4d3f0df75a2f2f7c265be0f1cc72 /user_guide/helpers/string_helper.html
parentc4dd200c1155a118afa32cd91d9bd67bc243f83a (diff)
Moved tutorial to new user guide directory.
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-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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-<title>String Helper : CodeIgniter User Guide</title>
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-<td><h1>CodeIgniter User Guide Version 2.0.3</h1></td>
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-<a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
-<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
-String Helper
-</td>
-<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
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-<!-- START CONTENT -->
-<div id="content">
-
-
-<h1>String Helper</h1>
-
-<p>The String Helper file contains functions that assist in working with strings.</p>
-
-
-<h2>Loading this Helper</h2>
-
-<p>This helper is loaded using the following code:</p>
-<code>$this->load->helper('string');</code>
-
-<p>The following functions are available:</p>
-
-<h2>random_string()</h2>
-
-<p>Generates a random string based on the type and length you specify. Useful for creating passwords or generating random hashes.</p>
-
-<p>The first parameter specifies the type of string, the second parameter specifies the length. The following choices are available:</p>
-
- alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1
-<ul>
- <li><strong>alpha</strong>:&nbsp; A string with lower and uppercase letters only.</li>
- <li><strong>alnum</strong>:&nbsp; Alpha-numeric string with lower and uppercase characters.</li>
- <li><strong>numeric</strong>:&nbsp; Numeric string.</li>
- <li><strong>nozero</strong>:&nbsp; Numeric string with no zeros.</li>
- <li><strong>unique</strong>:&nbsp; Encrypted with MD5 and uniqid(). Note: The length parameter is not available for this type.
- Returns a fixed length 32 character string.</li>
- <li><strong>sha1</strong>:&nbsp; An encrypted random number based on <kbd>do_hash()</kbd> from the <a href="security_helper.html">security helper</a>.</li>
-</ul>
-
-<p>Usage example:</p>
-
-<code>echo random_string('alnum', 16);</code>
-
-
-<h2>increment_string()</h2>
-
-<p>Increments a string by appending a number to it or increasing the number. Useful for creating "copies" or a file or duplicating database content which has unique titles or slugs.</p>
-
-<p>Usage example:</p>
-
-<code>echo increment_string('file', '_'); // "file_1"<br/>
-echo increment_string('file', '-', 2); // "file-2"<br/>
-echo increment_string('file-4'); // "file-5"<br/></code>
-
-
-<h2>alternator()</h2>
-
-<p>Allows two or more items to be alternated between, when cycling through a loop. Example:</p>
-
-<code>for ($i = 0; $i < 10; $i++)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo alternator('string one', 'string two');<br />
-}<br />
-</code>
-
-<p>You can add as many parameters as you want, and with each iteration of your loop the next item will be returned.</p>
-
-<code>for ($i = 0; $i < 10; $i++)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;echo alternator('one', 'two', 'three', 'four', 'five');<br />
-}<br />
-</code>
-
-<p><strong>Note:</strong> To use multiple separate calls to this function simply call the function with no arguments to re-initialize.</p>
-
-
-
-<h2>repeater()</h2>
-<p>Generates repeating copies of the data you submit. Example:</p>
-<code>$string = "\n";<br />
-echo repeater($string, 30);</code>
-
-<p>The above would generate 30 newlines.</p>
-<h2>reduce_double_slashes()</h2>
-<p>Converts double slashes in a string to a single slash, except those found in http://. Example: </p>
-<code>$string = &quot;http://example.com//index.php&quot;;<br />
-echo reduce_double_slashes($string); // results in &quot;http://example.com/index.php&quot;</code>
-<h2>trim_slashes()</h2>
-<p>Removes any leading/trailing slashes from a string. Example:<br />
- <br />
- <code>$string = &quot;/this/that/theother/&quot;;<br />
-echo trim_slashes($string); // results in this/that/theother</code></p>
-
-
-<h2>reduce_multiples()</h2>
-<p>Reduces multiple instances of a particular character occuring directly after each other. Example:</p>
-<code>
-$string="Fred, Bill,, Joe, Jimmy";<br />
-$string=reduce_multiples($string,","); //results in "Fred, Bill, Joe, Jimmy"
-</code>
-<p>The function accepts the following parameters:
-<code>reduce_multiples(string: text to search in, string: character to reduce, boolean: whether to remove the character from the front and end of the string)</code>
-
-The first parameter contains the string in which you want to reduce the multiplies. The second parameter contains the character you want to have reduced.
-The third parameter is FALSE by default; if set to TRUE it will remove occurences of the character at the beginning and the end of the string. Example:
-
-<code>
-$string=",Fred, Bill,, Joe, Jimmy,";<br />
-$string=reduce_multiples($string, ", ", TRUE); //results in "Fred, Bill, Joe, Jimmy"
-</code>
-</p>
-
-<h2>quotes_to_entities()</h2>
-<p>Converts single and double quotes in a string to the corresponding HTML entities. Example:</p>
-<code>$string="Joe's \"dinner\"";<br />
-$string=quotes_to_entities($string); //results in "Joe&amp;#39;s &amp;quot;dinner&amp;quot;"
-</code>
-
-<h2>strip_quotes()</h2>
-<p>Removes single and double quotes from a string. Example:</p>
-<code>$string="Joe's \"dinner\"";<br />
-$string=strip_quotes($string); //results in "Joes dinner"
-</code>
-
-</div>
-<!-- END CONTENT -->
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