因大小而无法上传文件

我正在尝试使用PHP上传文件!我尝试上传PNG,JPG,PDF,TXT文件,这些上传仅在文件大小约为20kb时才有效.当我尝试上传大小约为150KB $_FILE error = 3的文件时,会打印并且文件名允许说'1234.png',其中tmp_name为空,图像本身也是如此!这是我的代码

ini_set('display_errors',1);
error_reporting(-1);

$imageTmp = addslashes($_FILES['image']['tmp_name']);
//$imageTmp = $_FILES['image']['tmp_name'];
$imageOldName = addslashes($_FILES['image']['name']);
$imageData = file_get_contents($imageTmp);
//$imageData = base64_encode($imageTmp);

echo 'image temp name: '. $imageTmp .' ';
echo 'error: '. $_FILES['image']['error']. ' ';
echo 'image name: '. $imageOldName. ' ';
echo 'image data: '. $imageData. ' ';
echo 'image type:'. $_FILES['image']['type'];
echo "
";
echo "POST:";
print_r($_POST);
echo "FILES:";
print_r($_FILES);
echo "
";


$inipath = php_ini_loaded_file();

if ($inipath) {
echo 'Loaded php.ini: ' . $inipath;
} else {
echo 'A php.ini file is not loaded';
}

我尝试了多种解决方案,例如更改32M 的值post_max_size = 200M而upload_max_filesize = 200M不是32M

这是尝试上传txt文件4KB的结果:

image temp name: /Applications/MAMP/tmp/php/phpOc7d6a error: 0 
image Name: test.txt image data: hello image type:text/plain
POST:Array
(
[submit] => Record Test
)
FILES:Array
(
[image] => Array
    (
        [name] => test.txt
        [type] => text/plain
        [tmp_name] => /Applications/MAMP/tmp/php/phpOc7d6a
        [error] => 0
        [size] => 405
    )

  )  
  Loaded php.ini: /Applications/MAMP/bin/php/php5.6.10/conf/php.ini

上传PNG文件127KB的结果:

警告:file_get_contents():第10行上的path/test1.php中的文件名不能为空图像临时名称:错误:3图像名称:IMG_8807.JPG图像数据:图像类型:

POST:Array
(
)
FILES:Array
(
[image] => Array
    (
        [name] => IMG_8807.JPG
        [type] => 
        [tmp_name] => 
        [error] => 3
        [size] => 0
    )

)
Loaded php.ini: /Applications/MAMP/bin/php/php5.6.10/conf/php.ini

顺便说一句,上传失败后,服务器崩溃并显示502网关,我必须重新启动Apache!