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                # PDO::quote PDO::quote — 為SQL語句中的字符串添加引號。(PHP 5 &gt;= 5.1.0, PECL pdo &gt;= 0.2.1) ## 說明 ### 語法 ``` public string PDO::quote ( string $string [, int $parameter_type = PDO::PARAM_STR ] ) ``` PDO::quote() 為SQL語句中的字符串添加引號或者轉義特殊字符串。 ## 參數 **string** 要添加引號的字符串。 **parameter_type** 為驅動程序提供數據類型。 ## 返回值 返回一個帶引號的字符串,理論上可以安全的傳遞到SQL語句中并執行。如果該驅動程序不支持則返回FALSE。 ## 實例 ### 為普通字符串添加引號 ``` <?php $conn = new PDO('sqlite:/home/lynn/music.sql3'); /* Simple string */ $string = 'Nice'; print "Unquoted string: $string\n"; print "Quoted string: " . $conn->quote($string) . "\n"; ?> ``` 以上輸出結果為: ``` Unquoted string: Nice Quoted string: 'Nice' ``` ### 轉義特殊字符串 ``` <?php $conn = new PDO('sqlite:/home/lynn/music.sql3'); /* Dangerous string */ $string = 'Naughty \' string'; print "Unquoted string: $string\n"; print "Quoted string:" . $conn->quote($string) . "\n"; ?> ``` 以上例程會輸出: ``` Unquoted string: Naughty ' string Quoted string: 'Naughty '' string' ```
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