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^ s * | s * $ Comment: Can be used to delete the first line of the first line of the whitespace characters (including spaces, tabs, page breaks, etc. ), A very useful expression $ action = trim ($ _ get ['action']); if ($ action == "sub") {$ str = $ _post ['dir']; & ...
The characters you need to escape in the PHP tutorial regular expressions are as follows: $^* () +={}[]|/:<>. "Note: Perl style expressions require/start and end, such as:/food/table matching characters Food Perl modifiers are as follows: I complete a case-insensitive search G Find all occurrences (all occurrences, complete global search) m treats a string as multiline (m means multiple (listbox)). By default, ^ and $ ...
<! doctype html public "- // w3c // dtd xhtml 1.0 transitional // en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns = "http : //www.w3.org/1999/xhtml ...
PHP Tutorial To determine if IP is legitimate regular expression code function matchip ($q) {Preg_match ((25[0-5)) | ( 2[0-4]D) | (1DD) | ([1-9]d) |d) (. ( (25[0-5]) | (2[0-4]d) | (1DD) | ([1-9]d) |d)) {3}/', $q, $matches); return $matches [0]; $ipaddress = ' 201 ...
In this lesson, we want to learn how to increase the intelligent processing capacity of the Web page. Basic functions Welcome to the third and final lesson of this tutorial. If you've learned the first and second lessons, you've mastered the basics of installing and programming MySQL and PHP. Here are some of the other functions of PHP that might be useful to you and make your development process simpler. First, let's look at the document. You should know some basic concepts of the header file, right? The header file is an external file whose contents are included in the main program. ...
Php tutorial to verify the phone number and phone number is about to talk about the regular use of php to verify the user input phone number is consistent with China Telecom phone number rules, whether the phone number for China Mobile or China Unicom's mobile phone number. * / function funcphone ($ str) // phone number regular expression try {return (preg_match ("/ ^ (((d {3})) | (d {3} -))? ) | 0d {2,3} -)? ...
php tutorial Regularly specify the string content Preg_match function description Although the code is small, but the code is as follows: preg_match ('/ ^ (?! string) /', 'aa') === true This is used to verify a Whether a string begins with a 'string' or not, in a perl or perl-supported regular expression language such as php, can be done with a look-ahead declaration, as the regular expression is: preg_mat. ..
php tutorial recursively get url's address code // method $ str = '<a href="http://www.jzread.com" target="_blank" name="doc3_p"> <img src = "" onload = "setImgSize (this ...
Php tutorial Chinese characters match the regular expression Chinese characters match the regular expression: [u4e00-u9fa5] Commentary: Matching Chinese is really a headache, with this expression is easy to match the double-byte characters (including Chinese characters ): [^ X00-xff] Comment: Can be used to calculate the length of the string (a double-byte character length meter 2, ascii character meter 1) * / $ str = "singlepoint single point log"; if (preg_matc ...
php tutorial Regularly connected to the Chinese version of the program This paragraph program is to take out all the text in a title, the use of PHP's regular expression function to examples. $ htm = "<a href='http://www.jzread.com'> test1 </a> <br />". & n ...
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