preg_match

PHP 4, PHP 5, PHP 7, PHP 8
preg_match - Perform a regular expression match
Preg Match Online Tool
Manual
Code Examples

Example #1 Getting the domain name out of a URL

Result: domain name is: php.net
<?php
// get host name from URL
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Example #2 Using named subpattern

Result: Array ( [0] => foobar: 2008 [name] => foobar [1] => foobar [digit] => 2008 [2] => 2008 )
<?php
$str = 'foobar: 2008';
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Example #3 Find the string of text "php"

<?php
// The "i" after the pattern delimiter indicates a case-insensitive search
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Example #4 Find the word "web"

<?php
/* The \b in the pattern indicates a word boundary, so only the distinct
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Example #5 of preg_match

<?php
preg_match('/(foo)(bar)(baz)/', 'foobarbaz', $matches , 0, 0);
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Function preg_match:

Regular Expressions (Perl-Compatible) Functions

Most used PHP functions