Php regular expression preg_replace_callback function usage instance _ PHP Tutorial

Php regular preg_replace_callback function usage example. Php regular expression preg_replace_callback function usage example this article describes the php regular expression preg_replace_callback function usage. Share it with you for your reference. The specific implementation method is as follows: example of the use of the p php regular preg_replace_callback function

This article describes the usage of php regular expression preg_replace_callback. Share it with you for your reference. The specific implementation method is as follows:

Php regular expressions are powerful. This example demonstrates the usage of the preg_replace_callback function.

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// Define a dummy text, for testing... $ Text = "Title: Hello world! \ N "; $ Text. = "Author: Jonas \ n "; $ Text. = "This is a example message! \ N "; $ Text. = "Title: Entry 2 \ n "; $ Text. = "Author: Sonja \ n "; $ Text. = "Hello world, what's up! \ N "; // This function will replace specific matches // Into a new form Function RewriteText ($ Match ){ // Entire matched section: // --> /.../ $ EntireSection = $ Match [0]; // --> "\ NTitle: Hello world! " // Key // --> ([A-z0-9] +) $ Key = $ Match [1]; // --> "Title" // Value // --> ([^ \ N \ r] +) $ Value = $ Match [2]; // --> "Hello world! " // Add some bold () Tags to around the key Return''. $ Key .': '. $ Value; } // The regular expression will extract and pass all "key: value" pairs // The "RewriteText" function that is definied above $ NewText = preg_replace_callback ('/[\ r \ n] ([a-z0-9] +): ([^ \ n \ r] +)/I', "RewriteText ", $ Text ); // Print the new modified text Print $ NewText;

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Examples in this article describes the usage of the php regular expression preg_replace_callback function. Share it with you for your reference. The specific implementation method is as follows: p...