php imagecreatefrompng 根本不起作用
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imagecreatefrompng is not working at all
提问by user2679683
I already checked the file with mime type. If it is jpg or gif it is working perfectly with
我已经用 mime 类型检查了文件。如果它是 jpg 或 gif，它可以完美地配合使用
$src = imagecreatefromjpeg($tmpName);
and
和
$src = imagecreatefromgif($tmpName);
but if the image is png$src = imagecreatefrompng($tmpName);
但如果图像是png$src = imagecreatefrompng($tmpName);
srcvariable is empty in the pngcase, but in jpgand gifit is showing it's resource id.
src变量在png情况下为空，但在jpg和gif 中它显示它是resource id.
would someone tell me what i need to do?
有人会告诉我我需要做什么吗？
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $_FILES['photo']['tmp_name']);
unset($_FILES["photo"]["type"]);
$_FILES["photo"]["type"] = $mime;
if ((($_FILES["photo"]["type"] == "image/gif") || ($_FILES["photo"]["type"] == "image/jpeg") || ($_FILES["photo"]["type"] == "image/jpg") || ($_FILES["photo"]["type"] == "image/pjpeg") || ($_FILES["photo"]["type"] == "image/x-png") || ($_FILES["photo"]["type"] == "image/png")) && in_array($extension, $allowedExts)) {
if ($_FILES["photo"]["error"] > 0) {
echo "Error uploading file <a href='step-1.php'> Try again. </a>";
$image_check = 0;
exit;
} else {
$image_check = 1;
$fileName = $_FILES['photo']['name'];
$tmpName = $_FILES['photo']['tmp_name'];
$fileSize = $_FILES['photo']['size'];
$fileType = $_FILES['photo']['type'];
list($width1, $height1, $typeb, $attr) = getimagesize($tmpName);
//$filePath = $uploadDir . $fileName;
$size = filesize($_FILES['photo']['tmp_name']);
$ext = $_FILES["photo"]["type"];
if ($ext == 'image/jpeg' || $ext == 'image/jpg') {
$src = imagecreatefromjpeg($tmpName);
} else if ($ext == 'image/gif') {
$src = imagecreatefromgif($tmpName);
}
else if(($ext=='image/png')||($ext=='image/x-png'))
{
$src = imagecreatefrompng($tmpName);
}
$newwidth1 = 624;
$newheight1 = ($height1 * $newwidth1) / ($width1);
$tmp = imagecreatetruecolor($newwidth1, $newheight1);
imagecopyresampled($tmp, $src, 0, 0, 0, 0, $newwidth1, $newheight1, $width1, $height1);
$filename = "resources/images/" . $append . $_FILES['photo']['name'];
if ($ext == 'image/jpeg' || $ext == 'image/jpg') {
imagejpeg($tmp, $filename, 90);
} else if ($ext == 'image/gif') {
imagegif($tmp, $filename, 90);
}
else if(($ext=='image/png')||($ext=='image/x-png'))
{
imagepng($tmp, $filename, 90);
}
回答by MaxEcho
Write a file
写文件
<?php
phpinfo();
?>
Browse it, you will see JPG Supportand GIF create Supportare enabledbut PNG Supportis disabled.
浏览它，你会看到JPG Supportand GIF create Supportare enabledbut PNG Supportis disabled。
Enable PNG Support, it will work.
启用PNG Support，它将起作用。
回答by PgKc
Change from
更改自
imagepng($tmp, $filename, 90);
to
到
imagepng($tmp, $filename);
