In PHP 5.0.1, gd2.0.28 supports creating GIF images. [an image verification program is provided.]

In PHP 5.0.1, gd2.0.28 supports creating GIF images. I tested it. I have attached an image verification code that I wrote. I encapsulated it into a class in disorder. Actually, I can use the function. Modify it by yourself.

<? PHP

/**
* @ Author shenkong <shenkong@openphp.cn>
* @ Version $ ID
* @ Package SPB forum system
* @ Copyright: All rights reserved for shenkong. This Copyright must be reserved for any modification or use.
*/
Class checkimage
{
Public $ bglength;
Public $ bgwidth;
Public $ bgcolor;
Public $ fontsize;
Public $ fonttype;
Public $ length;
Public $ image;
Public $ string;

Function _ construct ($ info)
{
$ This-> bglength = $ info ["bglength"];
$ This-> bgwidth = $ info ["bgwidth"];
$ This-> fontsize = $ info ["fontsize"];
$ This-> fonttype = $ info ["fonttype"];
$ This-> length = $ info ["length"];
$ This-> image = $ this-> createimage ();
// $ Black = imagecolorallocate ($ this-> image, 0x00, 0x00, 0x00 );
$ White = imagecolorallocate ($ this-> image, 0xff, 0xff, 0xff );
Imagefilledrectangle ($ this-> image, 0, 0, $ this-> bglength, $ this-> bgwidth, $ white );
$ This-> miximage (500, 10 );
$ This-> write ();
$ This-> miximage (50, 5 );

// Set white to transparent
Imagecolortransparent ($ this-> image, $ white );
Header ("Content-Type: image/GIF ");
Imagegif ($ this-> image );
}

Function createimage ()
{
Return imagecreatetruecolor ($ this-> bglength, $ this-> bgwidth );
}

Function randcolor ()
{
Return imagecolorallocate ($ this-> image, mt_rand (0,200), mt_rand (0,100), mt_rand (0,150 ));
}

Public Function write ()
{
$ STR = MD5 (mt_rand ());
$ STR = strtoupper ($ Str );
$ STR = str_replace (Array ("I", "1", "5", "S", "4", "A", "8", "B ", "0", "D"), "", $ Str );
$ STR = substr ($ STR, 0, $ this-> length );
$ This-> string = $ STR;
$ W = ($ this-> bglength-($ this-> length-1) * 3)/$ this-> length;
For ($ I = 0; $ I <$ this-> length; $ I ++)
{
Imagettftext ($ this-> image, $ this-> fontsize, mt_rand (-20, 20), mt_rand ($ I * $ W + $ I * 3, ($ I + 1) * $ W + $ I * 3-$ this-> fontsize), mt_rand ($ this-> fontsize, $ this-> bgwidth-$ this-> bgwidth/10), $ this-> randcolor (), $ this-> fonttype, substr ($ STR, $ I, 1 ));
}
}

Function setstring ()
{
Require_once "session. Class. php ";
$ S = new session ();
$ S-> setpath ();
}

Function miximage ($ num= 500, $ fontsize = 10)
{
For ($ I = 0; $ I <$ num; $ I ++)
{
Imagettftext ($ this-> image, $ fontsize, mt_rand (-180,180), mt_rand (1, $ this-> bglength), mt_rand (1, $ this-> bgwidth ), imagecolorallocate ($ this-> image, mt_rand (150,255), mt_rand (150,255), mt_rand (150,255), $ this-> fonttype, "| ");
}
}
}

$ Info = array (
"Bglength" => 90,
"Bgwidth" => 30,
"Fontsize" => 18,
"Fonttype" => "Arial ",
"Length" => 5
);
New checkimage ($ info );
?>