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PHP-ImageCreate()错误_Php_Windows_Image - Fatal编程技术网

PHP-ImageCreate()错误

PHP-ImageCreate()错误,php,windows,image,Php,Windows,Image,我正在尝试制作验证码,我在网上读了一些教程。因此,我有复制/粘贴此功能: create_image(); exit(); function create_image() { //Let's generate a totally random string using md5 $md5_hash = md5(rand(0,999)); //We don't need a 32 character long string so we trim it down to

我正在尝试制作验证码,我在网上读了一些教程。因此,我有复制/粘贴此功能:

create_image(); 
exit(); 

function create_image() { 
    //Let's generate a totally random string using md5 
    $md5_hash = md5(rand(0,999)); 
    //We don't need a 32 character long string so we trim it down to 5 
    $security_code = substr($md5_hash, 15, 5); 

    //Set the session to store the security code
    $_SESSION["security_code"] = $security_code;

    //Set the image width and height 
    $width = 100; 
    $height = 20;  

    //Create the image resource 
    $image = ImageCreate($width, $height);  

    //We are making three colors, white, black and gray 
    $white = ImageColorAllocate($image, 255, 255, 255); 
    $black = ImageColorAllocate($image, 0, 0, 0); 
    $grey = ImageColorAllocate($image, 204, 204, 204); 

    //Make the background black 
    ImageFill($image, 0, 0, $black); 

    //Add randomly generated string in white to the image
    ImageString($image, 3, 30, 3, $security_code, $white); 

    //Throw in some lines to make it a little bit harder for any bots to break 
    ImageRectangle($image,0,0,$width-1,$height-1,$grey); 
    imageline($image, 0, $height/2, $width, $height/2, $grey); 
    imageline($image, $width/2, 0, $width/2, $height, $grey); 

    //Tell the browser what kind of file is come in 
    header("Content-Type: image/jpeg"); 

    //Output the newly created image in jpeg format 
    ImageJpeg($image); 

    //Free up resources
    ImageDestroy($image); 
}
但是当我尝试调用它时,我得到了以下错误:

致命错误:第19行调用C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\gtw\registration\createCaptcha.php中未定义的函数ImageCreate()


有什么问题吗?一些PHP库?

要能够使用ImageCreate,您需要将GD库作为PHP安装的一部分


使用phpinfo()函数检查是否已安装。如果没有,则需要添加此项

未启用
php_gd2
扩展

它包含在Windows PHP发行版中,但您必须在
PHP.ini
中启用它。为此,只需打开
php.ini
并取消注释(删除前导的
)以下行:

extension=php_gd2.dll

保存并重新启动Apache,您应该会没事。

您还没有启用php\u gd2扩展

它包含在Windows PHP发行版中,但必须在PHP.ini中启用它。为此,只需打开php.ini并取消注释(删除前导;)以下行:

extension=php_gd2.dll
extension=php_gd2.dll 保存并重新启动Apache,您应该会没事的

要找到Php.ini,请转到xampp文件夹

打开php文件夹 打开php.ini-development 第889行取决于php的版本 它包含在Windows PHP发行版中,但必须在PHP.ini中启用它。为此,只需打开php.ini并取消注释(删除前导;)以下行:

extension=php_gd2.dll
extension=php_gd2.dll
保存并重新启动Apache,您应该会没事。

看起来是这样。您是否安装了GD(例如,它是否在您的PHP信息中)?我的PHP.ini文件中没有这一行