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What does the php verification code display x mean?

藏色散人Original: 2022-11-03 09:11:502045browse

php verification code displays x, which means the verification code is not displayed normally. The solution: 1. Find the "checkCode.php" file; 2. Just add the "ini_set('display_errors','Off');" statement in the head of "checkCode.php".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

What does it mean when the php verification code displays x?

The verification code on the PHP user login interface is displayed as "X" (the verification code image cannot be displayed) Solution

1. The verification code is displayed as "X".

What does the php verification code display x mean?

2. Code browsing:

1> Login.php code, after inspection, there is no problem!

<?php
   require_once "common.php"; 
?>
<html>
  <head>
     <meta http-equiv="content-type" content="text/html;charset=utf-8"/>
  </head>
  <img  src="./images/1.gif" height="100px"    style="max-width:90%"/ alt="What does the php verification code display x mean?" >
  <hr/>
  <h1>管理员登录界面</h1>
<body>  
  <table style="font-size:14px;">
    <form action="loginProcess.php" method="post">
       <tr><td>用户ID：</td><td><input type="text" name="id" value="<?php echo getCookieVal("id");?>"></td></tr>
       <tr><td>密    码：</td><td><input type="password" name="password"></td></tr>
       <tr><td>验证码：</td><td><input type="text" name="checkCode"/></td>
       <td><img  src="checkCode.php" οnclick="this.src=&#39;checkCode.php?aa=&#39;+Math.random()" alt="What does the php verification code display x mean?" ></td>
       </tr>
       <tr><td colspan="2" align=&#39;center&#39;><input type="checkbox" name="keep" value="yes"> 保存用户ID</td></tr>
       <tr><td><input type="reset" value="重新填写"></td>
           <td><input type="submit" value="用户登录"></td>
       </tr>
    </form>
  </table>
  <?php
       if(!empty($_GET[&#39;errno&#39;])){
           $errno=$_GET[&#39;errno&#39;];
           if($errno==1){
                echo "<font color=&#39;red&#39; size=&#39;3&#39;>用户ID不能为空！</font>";
           }else if($errno==2){
             echo "<font color=&#39;red&#39; size=&#39;3&#39;>用户密码不能为空！</font>";       
           }else if($errno==3){
             echo "<font color=&#39;red&#39; size=&#39;3&#39;>用户名或密码错误！</font>";
           }else if($errno==4){
                echo "<font color=&#39;red&#39; size=&#39;3&#39;>无法使用此非法的路径进入该系统！</font>";
           }else if($errno==5){
             echo "<font color=&#39;red&#39; size=&#39;3&#39;>验证码输入有误！</font>";
           }
       }
  ?>
<body>
<hr/>
<img  src="./images/mylogo.jpg" height="180px"    style="max-width:90%"/ alt="What does the php verification code display x mean?" >
</html>

2>Then there must be something wrong with checkCode.php, the source code that generates the verification code!

<?php
   $w = 80; //设置图片宽和高
   $h = 26;
   $str = Array(); //用来存储随机码
   $string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";//随机挑选其中4个字符，也可以选择更多，注意循环的时候加上，宽度适当调整
   for($i = 0;$i < 4;$i++){
      $str[$i] = $string[rand(0,35)];
      $vcode .= $str[$i];
    }
   session_start(); //启用超全局变量session
   $_SESSION["myCheckCode"] = $vcode;
   $im = imagecreatetruecolor($w,$h);
   $white = imagecolorallocate($im,255,255,255); //第一次调用设置背景色
    $black = imagecolorallocate($im,0,0,0); //边框颜色
    imagefilledrectangle($im,0,0,$w,$h,$white); //画一矩形填充
    imagerectangle($im,0,0,$w-1,$h-1,$black); //画一矩形框
    //生成雪花背景
    for($i = 1;$i < 200;$i++){
        $x = mt_rand(1,$w-9);
        $y = mt_rand(1,$h-9);
        $color = imagecolorallocate($im,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255));
        imagechar($im,1,$x,$y,"*",$color);
    }
    //将验证码写入图案
    for($i = 0;$i < count($str);$i++){
        $x = 13 + $i * ($w - 15)/4;
        $y = mt_rand(3,$h / 3);
        $color = imagecolorallocate($im,mt_rand(0,225),mt_rand(0,150),mt_rand(0,225));
        imagechar($im,5,$x,$y,$str[$i],$color);
    }
    header("Content-type:image/jpeg"); //以jpeg格式输出，注意上面不能输出任何字符，否则出错
    imagejpeg($im);
    imagedestroy($im);
?>

3. The solution is as follows:

Add this sentence

   ini_set(&#39;display_errors&#39;,&#39;Off&#39;);

in the head of checkCode.php, that is:

What does the php verification code display x mean?

After refreshing the page, the result is as follows:

What does the php verification code display x mean?

Then the problem is solved!

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