PHP regular preg_replace_callback function usage example

PHP regular preg_replace_callback function usage example_PHP tutorial

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Release： 2016-07-13 09:52:05

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PHP regular preg_replace_callback function usage example

This article describes the usage of PHP regular preg_replace_callback function. Share it with everyone for your reference. The specific implementation method is as follows:

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

// Define a dummy text, for testing...

$Text = "Title: Hello world!n";

$Text .= "Author: Jonasn";

$Text .= "This is a example message!nn";

$Text .= "Title: Entry 2n";

$Text .= "Author: Sonjan";

$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

// --> ([^nr] )

$Value = $Match[2];

// --> "Hello world!"

// Add some bold () tags to around the key to

return '' . $Key . ': ' . $Value;

}

// The regular expression will extract and pass all "key: value" pairs to

// the "RewriteText" function that is definied above

$NewText = preg_replace_callback('/[rn]([a-z0-9] ): ([^nr] )/i', "RewriteText", $Text);

// Print the new modified text

print $NewText;

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// Define a dummy text, for testing... $Text = "Title: Hello world!n"; $Text .= "Author: Jonasn"; $Text .= "This is an example message!nn"; $Text .= "Title: Entry 2n"; $Text .= "Author: Sonjan"; $Text .= "Hello world, what's up!n"; // This function will replace specific matches // into a new form function RewriteText($Match){ // Entire matched section: // --> /.../ $EntireSection = $Match[0]; // --> "nTitle: Hello world!" // Key // --> ([a-z0-9] ) $Key = $Match[1]; // --> "Title" // Value // --> ([^nr] ) $Value = $Match[2]; // --> "Hello world!" // Add some bold () tags to around the key to return '' . $Key . ': ' . $Value; } // The regular expression will extract and pass all "key: value" pairs to // the "RewriteText" function that is defined above $NewText = preg_replace_callback('/[rn]([a-z0-9] ): ([^nr] )/i', "RewriteText", $Text); // Print the new modified text print $NewText;

I hope this article will be helpful to everyone’s PHP programming design. http://www.bkjia.com/PHPjc/1009823.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1009823.htmlTechArticlePHP regular preg_replace_callback function usage example This article describes the usage of php regular preg_replace_callback function. Share it with everyone for your reference. The specific implementation method is as follows: p...