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? ??? ?? PHP ???? PHP? ??? ???? ???? ????? ?? ??? ??

PHP? ??? ???? ???? ????? ?? ??? ??

Mar 07, 2017 am 09:48 AM

? ???? ?? PHP? ???? ???? ???? ??? ???? ??? ?????. ???? ?? ??? ?? ???? ???????

????? ?????? ?? ???? ?? ????, ?? ????? ??? ??? ????? ???. ???? ???? ???? ?? ??? ???????.

???? ??

????? ???? ?? PHP? gd2 ??? ????? ??? ????? ???(php.ini?? "php_gd2.dll"? ???? "; Extension=php_gd2.dll"? ?? ?? ?? ??? ????? ?????.

??: PHP? gd2 ?????? ?? ??

Core: img.php

? ???? ?? ??? ???? ?????. ??? ? ?? ??

??? 4?? ????

$check=rand(1000,9999);?

?????. ??? ?? ??? ?????

Session_start(); 
$_SESSION["check"] = $check;

?? ???

$im = imagecreate(80,30);

? ???? ??? ????? ?????? ???? ??? ???.

imagefill($im,0,0,ImageColorAllocate($im, 255,255,255));

?????? ???? ? ?? ??? ???? ???? 

$y1=rand(0,30); 
$y2=rand(0,30); 
$y3=rand(0,30); 
$y4=rand(0,30); 
imageline($im,0,$y1,70, $y3,000); 
imageline($im,0,$y2,70, $y4,000);

??? ??? ??? ???

$strx=rand(3,15); 
$stry=rand(2,15); 
imagestring($img,5,$strx,$stry,substr($check,0,1),ImageColorAllocate($img,34,87,100)); 
$strx+=rand(15,20);
$stry=rand(2,15); 
imagestring($img,5,$strx,$stry,substr($check,1,1),ImageColorAllocate($img,781,117,78)); 
$strx+=rand(15,20);
$stry=rand(2,15); 
imagestring($img,5,$strx,$stry,substr($check,2,1),ImageColorAllocate($img,160,40,40)); 
$strx+=rand(15,20);
$stry=rand(2,15); 
imagestring($img,5,$strx,$stry,substr($check,3,1),ImageColorAllocate($img,25,55,10));

?? ???

Header("Content-type: image/PNG"); 
ImagePNG($img);

?, ?? ??? ??? ????

??? ?????: index.php
??? ??? ?? ??? ????? ??? ?? ???????
 <!DOCTYPE html>
<html>
<body>
<form action="action.php" method="post">
<input type="text" name="cikle" placeholder="驗(yàn)證碼">
<br>
<img id="cikle" style="-webkit-user-select: none" src="img.php"><input type="submit" value="Submit">
</form> 
</body>
</html>
? ??? ???? ??? ?? "action.php"? ????? 
 ??: action.php
? ??? ??? ?? ???? ????. ?? ?? 
? ?? ?? ???? ??? ??? "???" ????. 
? ?? ??? ??? "??"??? 
<?php
Session_start(); 
if ($_SERVER["REQUEST_METHOD"] == "POST") {
 if($_SESSION["check"]!=intval($_POST["cikle"])){
 echo "不正確";
 }else{
 echo "正確";
 }
}



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Undresser.AI Undress

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