如何调试AJAX调用的PHP文件？

Question

我有一个用于上传图片的php文件(它上传图片,创建缩略图并为图片添加水印).该文件由AJAX调用.

它正在使用WAMPSERVER 2.0在Windows XP上的本地主机上工作.现在我已经安装了Windows Vista,突然它无法正常工作(图片上传但缩略图和水印部分不起作用).

我正在使用完全相同的软件来测试我的本地计算机上的应用程序(WAMPSERVER 2.0),但它不起作用.

如何调试此文件？以下是它的外观:

<?php

define('BASE_PATH', substr(dirname(dirname(__FILE__)), 0, -22));

// set the include path
set_include_path(BASE_PATH
                 . '/../../library'
                 . PATH_SEPARATOR
                 . BASE_PATH
                 . '/library'
                 . PATH_SEPARATOR
                 . get_include_path());

// autoload classes from the library
function __autoload($class) {
    include str_replace('_', '/', $class) . '.php';
}

$configuration = new Zend_Config_Ini(BASE_PATH
                                     . '/application'
                                     . '/configs/application.ini',
                                     'development');
$dbAdapter = Zend_Db::factory($configuration->database);
Zend_Db_Table_Abstract::setDefaultAdapter($dbAdapter);

function _getTable($table)
{
    include BASE_PATH
    . '/application/modules/default/models/'
    . $table
    . '.php';
    return new $table();
}

$albums = _getTable('Albums');
$media = _getTable('Media');

if (false === empty($_FILES)) {

    $tempFile = $_FILES['Filedata']['tmp_name'];
    $extension = end(explode('.', $_FILES['Filedata']['name']));

    // insert temporary row into the database
    $data = array();
    $data['type'] = 'photo';
    $data['type2'] = 'public';
    $data['status'] = 'temporary';
    $data['user_id'] = $_REQUEST['user_id'];
    $paths = $media->add($data, $extension, $dbAdapter);

    // save the photo
    move_uploaded_file($tempFile,
                       BASE_PATH . '/public/' . $paths[0]);

    // create a thumbnail
    include BASE_PATH . '/library/My/PHPThumbnailer/ThumbLib.inc.php';
    $thumb = PhpThumbFactory::create('/' . $paths[0]);
    $thumb->adaptiveResize(85, 85);
    $thumb->save(BASE_PATH . '/public/' . $paths[1]);

    // add watermark to the bottom right corner
    $pathToFullImage = BASE_PATH . '/public/' . $paths[0];
    $size = getimagesize($pathToFullImage);
    switch ($extension) {
        case 'gif':
            $im = imagecreatefromgif($pathToFullImage);
            break;
        case 'jpg':
            $im = imagecreatefromjpeg($pathToFullImage);
            break;
        case 'png':
            $im = imagecreatefrompng($pathToFullImage);
            break;
    }
    if (false !== $im) {
        $white = imagecolorallocate($im, 255, 255, 255);
        $font = BASE_PATH . '/public/fonts/arial.ttf';
        imagefttext($im,
                    13, // font size
                    0, // angle
                    $size[0] - 132, // x axis (top left is [0, 0])
                    $size[1] - 13, // y axis
                    $white,
                    $font,
                    'HunnyHive.com');
        switch ($extension) {
            case 'gif':
                imagegif($im, $pathToFullImage);
                break;
            case 'jpg':
                imagejpeg($im, $pathToFullImage, 100);
                break;
            case 'png':
                imagepng($im, $pathToFullImage, 0);
                break;
        }
        imagedestroy($im);
    }

    echo "1";

}

Answer 1

通常对此进行调试,您应该将步骤分解为函数并依次测试每个部分.

关于Ajax调试,您可能想尝试Zend_Log_Writer_FirePHP.它是Firebug的扩展,它读取PHP发送的标头中的额外数据,这意味着响应主体中的数据不包含调试输出,对于像图像这样的东西,仍然可以呈现.

一旦为Firebug 安装了FirePHP,就可以编写以下几行:

$wFirebug = new Zend_Log_Writer_Firebug();

$firebug = new Zend_Log($wFirebug);

$firebug->info($myArray);

$firebug->info('Got to line 10');