PHP Production Verification Code

<?php

/* Set English Digital Verification code */

/*

Session_Start ();

$image =imagecreatetruecolor (100,30);

Create a background color of white

$bgcolor =imagecolorallocate ($image, 255, 255, 255);

Fill the background with white

Imagefill ($image, 0, 0, $bgcolor);

$capth _code= ';

*/

/* Generate a pure digit verification code */

/*

for ($i =0; $i <4; $i + +) {

$fontsize =6;//Font Size

Set Dark font Color

$fontcolor =imagecolorallocate ($image, Rand (0,120), Rand (0,120), Rand (0,120));

$fontcontent =rand (0,9);//Verification Code content

$capth _code.= $fontcontent;

The coordinates of the text placement

$x = ($i *100/4) +rand (5,10);

$y =rand (5,10);

Imagestring ($image, $fontsize, $x, $y, $fontcontent, $fontcolor);

}

*/

/* Generate English alphabet and digital verification code

for ($i =0; $i <4; $i + +) {

$fontsize =6;//Font Size

Set Dark font Color

$fontcolor =imagecolorallocate ($image, Rand (0,120), Rand (0,120), Rand (0,120));

$data = ' abcdefghigklmnopqrstuvwxyz0123456789 ';

$fontcontent =substr ($data, Rand (0,strlen ($DATA)), 1);//Verification Code content

$capth _code.= $fontcontent;

The coordinates of the text placement

$x = ($i *100/4) +rand (5,10);

$y =rand (5,10);

Imagestring ($image, $fontsize, $x, $y, $fontcontent, $fontcolor);

}

$_session[' Authcode ']= $capth _code;

Draw interference elements

Draw interference points

for ($i =0; $i <200; $i + +) {

Set the color of a light point

$pointcolor =imagecolorallocate ($image, Rand (50,200), Rand (50,200), Rand (50,200));

Imagesetpixel ($image, Rand (1,99), Rand (1,29), $pointcolor);

}

Draw interference Lines

for ($i =0; $i <3; $i + +) {

$linecolor =imagecolorallocate ($image, Rand (1,99), Rand (1,99), Rand (1,99));

Imageline ($image, Rand (1,99), Rand (1,29), Rand (1,99), Rand (1,29), $linecolor);

}

Output picture Information

Header (' content-type:image/png ');

Imagepng ($image);

Imagedestroy ($image);

*/

/* Generate Chinese Verification code */

Session_Start ();

$image =imagecreatetruecolor (200,60);//Chinese is larger than

$bgcolor =imagecolorallocate ($image, 255, 255, 255);

Fill the background with white

Imagefill ($image, 0, 0, $bgcolor);

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silkworm residual ashamed miserable Cang bin Cang the operation of the rough groove Cao Grass toilet side book test layer rubbing fork stubble Tea Check the difference between the astonished demolition of the Jackal mixed with cicada greedy slander to shovel production chatter Chang Hanzi field taste Chang Chang long to repay the bowel factory open sing the song of Chao Chao the nest noisy speculation car pull the button Chen Chen Chen Dust morning greetings Shen Chan while lining support said City Orange into a ride to punish Cheng Cheng the scale to eat crazy hold spoon pool late relaxation shame teeth waste ruler red fin Chi-Chong Worm Chong Pet reward domain lift Catinaccio thick sorrow raise revenge silk Look at the ugly smelly first out of the kitchen energetically hoe chu in addition to Chu Chu twitching touch of the river in the rafters to pass the boat surge of sores window building bed Chong Blow cooking hammer Vertical chun alcohol lip chun pure stupid poke flaw ci ci 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$wordarr =str_split ($WORDSTR, 3);//utf-8 encoding, Chinese is 3 bits, if not utf-8 encoding, you need to convert, because the GD library only supports this one encoding

$capth _code= ';

$fontface = ' fzytk. TTF ';

/* Chinese Verification Code */

for ($i =0; $i <4; $i + +) {

$fontcolor =imagecolorallocate ($image, Rand (0,120), Rand (0,120), Rand (0,120));

$index =rand (0,count ($wordarr));

$CN = $wordarr [$index];

$capth _code.= $CN;

Imagettftext ($image, Mt_rand (20,24), Mt_rand ( -60,60), (40* $i +20), Mt_rand (30,35), $fontcolor, $fontface, $CN);

}

$_session[' Authcode ']= $capth _code;

Draw interference elements

Draw interference points

for ($i =0; $i <200; $i + +) {

Set the color of a light point

$pointcolor =imagecolorallocate ($image, Rand (50,200), Rand (50,200), Rand (50,200));

Imagesetpixel ($image, Rand (1,199), Rand (1,59), $pointcolor);

}

Draw interference Lines

for ($i =0; $i <3; $i + +) {

$linecolor =imagecolorallocate ($image, Rand (1,99), Rand (1,99), Rand (1,99));

Imageline ($image, Rand (1,199), Rand (1,59), Rand (1,199), Rand (1,59), $linecolor);

}

Output picture Information

Header (' content-type:image/png ');

Imagepng ($image);

Imagedestroy ($image);

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