regular expression tutorial

Example of a regular expression: check email integrity in php .? Phpif (eregi (^ [_. 0-9a-z-] + @ ([0-9a-z] [0-9a-z-] + .) + [a-z] $, $ email) {echo your e-mail through a preliminary check ;}? In this sentence, an eregi function is applied first. If (eregi ("^ [_. 0-9a-z-] + @ ([0-9a-z] [0-9a-z-] +.) + [a-z] $", $ email )){ Echo "your email has passed the preliminary check "; } ?> In this sentence, an eregi

A preliminary study on the regular expression of PHP (a) Basic article Regular expressions are a relatively difficult part of PHP beginners to face, time long often will be the role of all kinds of symbols forgotten. But after a systematic summary, you will find that the difficulty of memory is not very large. Perl is a more common and compatible

Php regular expression matching Chinese problem analysis ,. Php regular expression matching Chinese problem analysis, $ str People's Republic of China 123456789 abcdefg; echopreg_match (^ [u4e00-u9fa5_a-zA-Z0-9] {} $, $ strName ); run the above code php regular

Php regular expression preg_match () usage. With preg_match (), we can complete string rule matching. If a match is found, the preg_match () function returns 1; otherwise, 0. Another optional third parameter allows you to use preg_match () to complete string rule matching. If a match is found, the preg_match () function returns 1; otherwise, 0. Another optional third parameter allows you to store the matche

Example of a regular expression: convert a date in MMDDYYYY format to a YYYY-MM-DD format. Htmlheadtitle regular expression titleheadbodyahref. return list aformaction? Echo $ PHP_SELF ;? For methodpost, enter the date in MMDDYYYY format: inputtypetextname Regular

Php code for obtaining the physical address of the specified IP address (regular expression ). If you build your own IP database to occupy resources and the update is inconvenient, why not use a ready-made IP address for query? Below, I wrote a PHP code for obtaining the physical IP address. (if there are some flaws, please do not recommend that you build your own IP database to occupy resources, and the up

; 2 [4] => 9 [5] => 0 [6] => 3 [7] => 0 ) ) Php gets the number of the specified string $ a = "The number of the 123 generation in the era of"; a function can capture the Number 12345678 in $ a. If not, 0 is returned. To write a function, 1. only matching digits of 8 characters in length 2. if no value is found, the system returns a number to be changed. If no value is found, the system returns 0. ? 1 2 3 Function a ($ str ){ Return preg_match ('/([0-9] {8})/', $ st

The template engine based on regular expression substitution can easily meet the limit of the maximum backtracking/recursion of regular expressions. Lazy matching is not scary, normally the template is not enough, often does not exceed the limit, the Discuz template engine is heavily used. But instead of paying attention and not learning, it is easy to write mist

PHP regular expression verification Email method. PHP regular expression verification Email method this article describes the PHP regular expression verification Email method. Share it with you for your reference. The details are

Ask a regular expression for writing: 1, 33, 44,112, 2. it does not seem easy to write! Thank you !!! At last, this post was edited by vencie from 2013-02-2221:0. ask for a regular expression: nbsp; 44,112, 2, that is, the numbers separated by commas. there are two requirements for a

Hero! Evaluate a small regular expression statement ~~~ Dear heroes ~ How to extract a regular expression: the following address is PHPcodewww. daikuan. comsellshow. php? Itembuysh! Evaluate a small regular expression statement ~~

1. at present, regular expressions have been widely used in many software applications, including * nix (Linux, Unix, etc.), HP and other operating systems, PHP, C #, Java and other development environments, and many applications can see the shadow of regular expressions. The use of regular expressions can be implemented in a simple way. For simplicity, effective

If you want to match all the image addresses in a webpage address with a regular expression, write the following regular expression: $ reg lt; imgs *. * srcs * s * [|]? S * ([^ gt;] *) I; why is it like the following image file address: To match all image addresses in a webpage address, write the

The regular expression matching of the preg_match_all function in PHP is described in detail. The preg_match_all function is used to obtain the specified data content. it is often used to execute many regular expressions. next I will introduce two tutorials on the implementation of the preg_match_all function, one is to obtain the preg_match_all function, which i

Example of a regular expression: obtain all superlinks on a webpage. Htmlheadtitle regular expression titleheadbodyahref. back to list abrformaction? Echo $ PHP_SELF ;? MethodpostURL: inputtypetextnameurlvalue? Echo $ url? Input Regular expressionBack to list If (isset ($ u

Previously saw people on the site of the content is automatically updated every day, think this technology is magical. Also have been wondering why their website is not big, it is impossible to have their own forecast center, But the weather forecast is automatically updated every day, and then learned from others, it is because there is a thief program this thing exists ~ The thief procedure says the good point is collects the procedure, collects other people's website the information to own we

What is a simple regular expression? Reply to score! The telephone number field (telvarchar type) stores three numbers and ends with a semicolon, for example, 0510-12323475,0781-26354589,021-25698746 (three numbers are stored simultaneously) 0521-25698745 ,, (It is possible to store only one phone number.) 0521 is a simple regular

We know that in the SQL, you can use like this predicate (expression) for fuzzy retrieval, and support for the%,?, _ and other placeholders.However, the function of this fuzzy search has many limitations, simply too vague.The REGEXP keyword is provided in MySQL to support regular expressions, of course, just some simple regular.First, we construct some test data. Copy Code code as follows: --

Php uses curl and regular expressions to capture webpage data samples. The curl and regular expression are used to capture novels from non-vip chapters of the Chinese text Network, and the novel ID can be input to download novels. Dependency: curl can be viewed in a simple way. it uses the curl and regular

Preg_filter (PHP 5 >= 5.3.0) preg_filter-perform a regular expression search and replace Mixed Preg_filter (mixed $pattern, mixed $replacement, mixed $subject [, int $limit =-1 [, int $count]]) Preg_filter () is equivalent to Preg_replace () except that it simply returns (possibly transformed) the result that matches the target. For more detailed information on how this function works, please read the pre