php preg_match regular expression function example, phppregmatch function_PHP tutorial

php preg_match regular expression function example, phppregmatch function

Regular expressions are used in almost all programming languages. This example introduces the application of the regular expression preg_match function in php .

The preg_match() function is used for regular expression matching and returns 1 successfully, otherwise it returns 0.
preg_match() will stop matching after one successful match. If you want to match all results, you need to use the preg_match_all() function.

Grammar:

preg_match (pattern , subject, matches)

参数	描述
pattern	正则表达式
subject	需要匹配检索的对象
matches	可选，存储匹配结果的数组

Parameters

Description

pattern

Regular expression

subject

Need to match the retrieved object

matches

Optional, array to store matching results

Example:

<?<span>php
</span><span>$str</span>="Daniel J. Gross Catholic High School A. is a faith and family based community committed to developing Christian leaders through educational excellence in the Marianist tradition."<span>;
</span><span>if</span>(<span>preg_match</span>("/[A-Z]. /",<span>$str</span>,<span>$matches</span><span>)){
    </span><span>print_r</span>(<span>$matches</span><span>);
}
</span>?>

This example matches strings with capital letters followed by . and spaces. It can only match J., because preg_match() will stop matching after one successful match, and will not match again later. Matched.

<span>Array</span> ( [0] => J. ) 

Output result:

Original address: http://www.manongjc.com/article/52.html

Related reading:

PHP regular expression function usage examples

php preg_match function and php preg_match_al function l instances, methods, examples

php preg_match_all() function usage example

php preg_match regular expression function example

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php preg_match regular expression function example, phppregmatch function regular expressions are used in almost all programming languages, this book An example introduces the application of the regular expression preg_match function in php...