preg_match ( string $pattern , string $subject [, array &$matches [, int $flags = 0 [, int $offset = 0 ]]] ) : int

<?php

$my_email = "name@company.com";

if (preg_match("/^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z.]{2,5}$/", $my_email)) {

echo "$my_email is a valid email address";

}

else

{

  echo "$my_email is NOT a valid email address";

}

?>

if(!preg_match('/^\[a-zA-Z]+$/',$input)) {

   // String contains not allowed characters ...

}

<?php

$subject = "abcdef";

$pattern = '/^def/';

preg_match($pattern, $subject, $matches, PREG_OFFSET_CAPTURE, 3);

print_r($matches);

?>

$inputString = "Hello, World!";

$pattern = "/Hello/";

​

if (preg_match($pattern, $inputString)) {

    echo "Pattern found!";

} else {

    echo "Pattern not found!";

}

<?php

$my_url = "www.guru99.com";

if (preg_match("/guru/", $my_url))

{

    echo "the url $my_url contains guru";

}

else

{

    echo "the url $my_url does not contain guru";

}

?>

$utterance = 'This is a brown bear with 7 kids';

$template = 'This is a {color} bear with {kids} kids';

​

$templateRegex = '/' . preg_replace('/\{(.*?)\}/', '(?<\1>.*?)', $template) . '/';

​

$matches = [];

preg_match($templateRegex, $utterance, $matches);

​

var_dump($matches);

<?php

​

$my_text="I Love Regular Expressions";

​

$my_array  = preg_split("/ /", $my_text);

​

print_r($my_array );

​

?>

int preg_match (string pattern, string string [, array pattern_array], [, int $flags [, int $offset]]]);

​

<?php

function_name('/pattern/',subject);

?>