PHP makes a simple verification code

<?php

header("Content-type:image/png");

Set the size of a picture

$image = Imagecreatetruecolor(+ );

Set the background value of an image

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

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

Generate random numbers

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

$fontsize = 6;

//color of the generated font

$fontcolor = imagecolorallocate ($image, rand (0, $ ), rand (0, $ ), rand ( 0) );

//Create a range of fonts

$fontcontent = rand (0, 9);

//The coordinates of the generated numbers

$x = ($i*4) + rand (5, Ten);

$y = rand (5, Ten);

//Draw a random number on the picture

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

}

Add interference point elements

For ($i = 0; $i < $i+ +) {

$pointcolor = imagecolorallocate ($image, rand (+), rand ( 200), C19>rand (a );

//Draw a single pixel

imagesetpixel ($image, rand (0, ( ), rand (0), $pointcolor);

}

Increase interference Line

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

$linecolor = imagecolorallocate ($image, rand (+ ) , rand (+), rand ( C11>80, ( ));

//Draw a line segment

imageline ($image, rand (1 ), rand (1, ), Rand (1, ), rand ( 1 ), $linecolor);

}

imagepng ($image);

Destroyed

Imagedestroy($image);

?>

PHP makes a simple verification code