php正則preg_replace_callback函數用法執行個體，pregreplace正則_PHP教程

php正則preg_replace_callback函數用法執行個體，pregreplace正則

本文執行個體講述了php正則preg_replace_callback函數的用法。分享給大家供大家參考。具體實現方法如下：

phpRegex功能強大，本範例示範了preg_replace_callback函數的用法

// Define a dummy text, for testing...$Text = "Title: Hello world!\n";$Text .= "Author: Jonas\n";$Text .= "This is a example message!\n\n";$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 formfunction 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 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('/[\r\n]([a-z0-9]+): ([^\n\r]+)/i', "RewriteText", $Text);// Print the new modified textprint $NewText;

希望本文所述對大家的php程式設計有所協助。

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