PHP 정규 표현식 10가지 사용 예제

Matching a Valid Email Address

$email = 'editor@thedaily.com'

if (!preg_match('^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$^', $email)) {

echo 'The email address you entered was invalid.';

}

Matching a string between 4 and 128 characters

$string = "tutorial";

if (!preg_match('#^(.){4,128}$#', $string)) {

echo 'The string you entered is invalid.';

}

Matching an integer between 1 and 16 characters in length

$int = 4;

if (!preg_match('#^[0-9]{1,16}$#', $int)) {

echo 'That is not a valid integer.';

}

Matching Content between any given HTML tag with attributes

simply replace “style” with HTML tag your trying to match.

$html = '<style class="sdfgsd">this is the matched pattern</style>';

preg_match('/<style(.*)?>(.*)?<\/style>/', $html, $match);

print $match[2];

Matching a Valid http:// URL

$url = http://www.tutorialcadet.com

if (!preg_match('/^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/', $url)) {

echo 'The URL you entered was invalid. Be sure to include <strong>http://</strong>';

}

Matching a US Phone Number

$phonenumber = '333-333-3333';

if(preg_match("/^[0-9]{3,3}[-]{1,1}[0-9]{3,3}[-]{1,1}[0-9]{4,4}$/", $phonenumber)) {

echo $phonenumber;

}

Matching a UK Phone Number

$ukphonenumber = '01614840484';

if(preg_match("/^[0-9]{11,11}$/", $ukphonenumber)) {

echo $ukphonenumber;

}

Matching a UK Postal code

$postal = 'AL42PT';

if(preg_match("/^[A-Z]{1,2}([0-9]{1,2}|[0-9]{1,1}[A-Z]{1,1})( |)[0-9]{1,1}[A-Z]{2,2}$/", $postal)) {

echo $postal;

}

Matching a US Zip Code

$zip = '55416';

if(preg_match("/^[0-9]{5,5}$/", $zip)) {

echo $zip;

}

Matching an IPv4 IP address

$ip = '233.122.122.255';

if(preg_match("/^(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/", $ip)) {

echo $ip;

}

Matching an IPv6 IP address

<?php

$ip = 'fe80:0000:0000:0000:0204:61ff:fe9d:f156';

if(preg_match("/^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?\s*$/", $ip)) {

echo $ip;

}

?>