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In php, GD library is used for verification code, and phpgd library is used for verification code. Use GD library to do verification code in php, phpgd library verification code php require_once 'string.func.php';//Use GD library to do verification code/** *Add verification text* @param int $type * @param int $length */function
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Simple verification code generation, simple verification code generation. Simple verification code generation, simple verification code generation for($i= 0;$i 5;$i ){ $rand .= dechex( rand( 1, 15)); // Random number hexadecimal 1-F generation 5} $im = imagecreatetruecolor (100, 30)
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PHP dynamically randomly generates verification code class
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