|
This article introduces how to use PHP regular expressions to match strings that start with "abc" and cannot end with "xyz". Friends in need can refer to it.
Requirements: Use PHP regular expressions to match strings that begin with "abc" but cannot contain "x", "y", or "z" at the end. Analysis: Starting with abc, the regular expression is written like this: ^abc. It starts with abc and must be followed by a string of characters. Generally use [^…………] to negate. Since it negates "x", "y", and "z", it is [^xyz]. The complete regular expression is this: ^abc[^xyz]*$The following is a complete php example using this regular expression, as follows:
<?php
$str = 'abcdef124f';
$search = '/^abc[^xyz]*$/';
if(preg_match($search,$str)) {
echo $str.' 符合<br />';
}else {
echo $str.' 不符合<br />';
}
//output abcdef124f 符合
$str = 'abcdef12x124';
if(preg_match($search,$str)) {
echo $str.' 符合<br />';
}else {
echo $str.' 不符合<br />';
}
//output abcdef12x124 不符合
//edit by bbs.it-home.org
?>Copy after login |
What are the problems with using php
Is Bitcoin legal in China?
What are the main differences between linux and windows
How to modify the hosts file
Which key should I press to recover when I can't type on my computer keyboard?
Kaspersky Firewall
Application of artificial intelligence in life
vb.net tutorial
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
