PHP implementation generates mixed verification code and image Verification code and test (code)

This article brings the content is about the PHP implementation to generate mixed verification code and image Verification code and test (code), there is a certain reference value, the need for friends can refer to, I hope to help you.

Generate a hybrid verification code and encapsulate it into a function, file name: buildVerifyCode.func.php

Range (' A ', ' Z ') generates an indexed array of contents in parentheses as a key value//array_merge ($array 1, $array 2) merges the key values in two arrays, generates a new indexed array//array_flip () will enclose the contents of the parentheses, Key name and key value//array_rand ($array, $length) randomly takes the key name of the $length length in the $array as the key value of the new array, generates an indexed array//join (", $array) to the value in the null connection array, Generates a string as the contents of an array

<?phpfunction Buildverifycode ($type =2, $length =4) {switch ($type) {case 0: $string =join (", Array_rand (range (0,9), $ length)); Break;case 1: $string =join ("", Array_rand (Array_flip (range (' A ', ' Z '), Range (' A ', ' Z ')), $length ); Break;case 2: $string =join ("", Array_rand (Array_flip (' A ', ' Z '), Range (' A ', ' Z '), Range (Array_merge)), $ length)); break;} return $string;}

Test generated verification code is correct, file name: getcode.php

<?phprequire ' buildVerifyCode.func.php '; echo buildverifycode ();//$fontfiles =[' MSYH.TTC ', ' MSYHBD.TTC ', ' MSYHL.TTC ', ' SIMSUN.TTC ', ' SITKA.TTC '];//$fontfile = $fontfiles [Mt_rand (0,count ($fontfiles)-1)];//Var_dump ($ Fontfile);

Generate an image verification code, the specific comment is empty and then write, file name: getVerifyCodeImg.func.php

<?php$width=100; $height =30;//Create canvas, default background black, Rgb0,0,0$image=imagecreatetruecolor ($width, $height);//Create white, easy to overlay canvas $ White=imagecolorallocate ($image, 255,255,255);//Create a white rectangle to cover the original canvas Imagefilledrectangle ($image, 2, $width-2, $height, $white); require ' buildVerifyCode.func.php '; $type =2; $length =4; $verifyCode =buildverifycode ($type, $length); for ($i = 0; $i < $length; $i + +) {$color =imagecolorallocate ($image, Mt_rand (50,90), Mt_rand (80,200), Mt_rand (90,150)); $size = Mt_rand (14,16); $angle =mt_rand ( -15,15); $x = ($i *100/5) + $size; $y =mt_rand (20,25); $fontfiles =[' MSYH.TTC ', ' MSYHBD.TTC ', ' MSYHL.TTC ', ' SIMSUN.TTC ', ' SITKA.TTC ']; $fontfile = ". /fonts/". $fontfiles [Mt_rand (0,count ($fontfiles)-1)]; $text =substr ($verifyCode, $i, 1); Imagettftext ($image, $size, $ Angle, $x, $y, $color, $fontfile, $text);} $pixel =120;if ($pixel) {$pixelcolor =imagecolorallocate ($image, Mt_rand (150,170), Mt_rand (100,140), Mt_rand (90,160)) ; for ($i =0; $i < $pixel; $i + +) {Imagesetpixel ($image, Mt_rand (0, $width-1), Mt_rand (0, $height-1), $pixelcolor);}} $line =4;if ($line) {for ($i =0; $i <$Line; $i + +) {imageline ($image, Mt_rand (0, $width-1), Mt_rand (0, $height-1), Mt_rand (0, $width-1), Mt_rand (0, $height-1), $pixelcolor);}} Header (' content-type:image/png '); Imagepng ($image); Imagedestroy ($image);