php正则preg_!replace_callback函数用法实例

2019-11-02 14:32:30

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　　本文实例讲述了php正则preg_replace_callback函数的用法。分享给大家供大家参考。具体实现方法如下：

　　php正则表达式功能强大，本范例演示了preg_replace_callback函数的用法

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 // 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 (<b>) tags to around the key to return '<b>' . $Key . '</b>: ' . $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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　　希望本文所述对大家的php程序设计有所帮助。

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