PHP preg_match_all() Function

Hello folks! welcome back to a new section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP preg_match_all() Function.

PHP preg_match_all() function matches all the occurrences of pattern in a string.

This PHP function places these matches in the array pattern_array in the order that you specify using the optional input parameter order. There are two possible types of order and they are -

• PREG_PATTERN_ORDER - This is the default if the optional order parameter is not added. PREG_PATTERN_ORDER specifies the order in a way you might think most logical; $pattern_array[0] is an array of complete pattern matches, $pattern_array[1] is an array of strings that matches the first parenthesized regexp.

• PREG_SET_ORDER - This orders the array a bit differently than the default setting. $pattern_array[0] contains the elements that are matched by the first parathesized regexp, $pattern_array[1] contains elements that are matched by the next parenthesized regexp, etc.

READ: PHP eregi_replace() Function

Syntax

The following is the syntax to make use of the preg_match_all() function -

string preg_match_all (string pattern,  string string,  array pattern_array [,  int order] );

Return Value

• This returns the numbers of matchings.

Example

Following is a simple example -

<?php
   $userinfo = "Name: <b>Bethel Prince</b> <br> Title: <b>PHP Guru</b>";
   preg_match_all ("/<b>(.*)<\/b>/U", $userinfo, $pat_array);
   
   print $pat_array[0][0]." <br> ".$pat_array[0][1]."\n";
?>

Output

When the above code is executed, it will produce the following result -

Bethel Prince 
PHP Guru

READ: PHP preg_match() Function

Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP preg_replace() Function.

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