我有一个脚本，可以在上传后调整图像大小。它在JPG上效果很好，但是我如何修改它也可以接受PNG？然后如何将生成的图像放入准备好附加到电子邮件的新数组中？
// upload original files //
$target_dir = "uploads/";
$file1 = $_FILES["uploaded_file1"]["name"];
$file2 = $_FILES["uploaded_file2"]["name"];
$file3 = $_FILES["uploaded_file3"]["name"];
$file4 = $_FILES["uploaded_file4"]["name"];
$file5 = $_FILES["uploaded_file5"]["name"];
$target_file1 = $target_dir . basename($_FILES["uploaded_file1"]["name"]);
$target_file2 = $target_dir . basename($_FILES["uploaded_file2"]["name"]);
$target_file3 = $target_dir . basename($_FILES["uploaded_file3"]["name"]);
$target_file4 = $target_dir . basename($_FILES["uploaded_file4"]["name"]);
$target_file5 = $target_dir . basename($_FILES["uploaded_file5"]["name"]);
move_uploaded_file($_FILES["uploaded_file1"]["tmp_name"], $target_file1);
move_uploaded_file($_FILES["uploaded_file2"]["tmp_name"], $target_file2);
move_uploaded_file($_FILES["uploaded_file3"]["tmp_name"], $target_file3);
move_uploaded_file($_FILES["uploaded_file4"]["tmp_name"], $target_file4);
move_uploaded_file($_FILES["uploaded_file5"]["tmp_name"], $target_file5);
// create arrays //
$filearray = array($file1,$file2,$file3,$file4,$file5);
$target_filearray = array($target_file1,$target_file2,$target_file3,$target_file4,$target_file5);
$typearray = array("Boiler", "Gas Meter", "Pipe work", "Flue", "Other");
// resize image //
$length = count($filearray);
for ($i = 0; $i < $length; $i++) {
if (!empty($filearray[$i])){
$ext = pathinfo($filearray[$i], PATHINFO_EXTENSION);
$new_file = img_resize("./uploads/", $filearray[$i], $name . " - " . $typearray[$i] . "." . $ext, 1920);
}
else {
// skip this file //
}
}
function img_resize($path,$tmp_name,$new_name,$new_width){
list($width, $height) = getimagesize($path . $tmp_name);
$new_height = abs($new_width * $height / $width);
$image_p = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg($path . $tmp_name);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagejpeg($image_p, $path . $new_name);
return $path . $new_name;
}
// store resized files for attaching //
$filearrayresized = array();
非常感谢您的帮助！ 海伦
答案 0 :(得分：0)
更改
$image = imagecreatefromjpeg($path . $tmp_name);
收件人
$image = imagecreatefromstring(file_get_contents($path . $tmp_name));
对此代码进行了一些更改，将数组定义移至此处并在循环中将新文件推送到其中
// resize image //
$filearrayresized = array();
$length = count($filearray);
for ($i = 0; $i < $length; $i++) {
if (!empty($filearray[$i])){
$ext = pathinfo($filearray[$i], PATHINFO_EXTENSION);
$new_file = img_resize("./uploads/", $filearray[$i], $name . " - " . $typearray[$i] . "." . $ext, 1920);
$filearrayresized[] = $new_file;
}
else {
// skip this file //
}
}
附加到电子邮件是整个问题，因为我认为这是它自己的主题...
答案 1 :(得分：0)
您可以修改该函数，以使对getimagesize的调用返回type属性，然后在创建jpeg或png时使用image_type_to_mime_type派生逻辑。可以很容易地扩展为也包括gif或bmp图像。
我还没有测试以下btw
function img_resize( $path, $tmp_name, $new_name, $new_width ){
list( $width, $height, $type, $attr ) = getimagesize( $path . $tmp_name );
$new_height = abs( $new_width * $height / $width );
$image_p = imagecreatetruecolor($new_width, $new_height);
switch( image_type_to_mime_type( $type ) ){
case IMG_PNG:
$image = imagecreatefrompng( $path . $tmp_name );
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagepng($image_p, $path . $new_name);
break;
case IMG_JPEG:
case IMG_JPG:
$image = imagecreatefromjpeg($path . $tmp_name );
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagejpeg($image_p, $path . $new_name);
break;
}
return $path . $new_name;
}
我开始玩了一会儿，发现我确实在上面犯了一个小错误（以为image_type_to_mime_type返回了IMG_XXX类型常量之一，但事实并非如此。这是我在玩耍时拼凑的版本。在测试中这一切似乎都可以正常工作！
<?php
function resizeImage( $obj=object ){
try{
if( is_object( $obj ) ){
$attribs=['newname','name','tmp_name','error','size','path','width'];
foreach( $attribs as $attrib ){
if( !property_exists( $obj, $attrib ) ) throw new Exception( sprintf( 'Critical: %s is missing from input object', $attrib ) );
}
$new = $obj->newname;
$path = $obj->path;
$name = $obj->name;
$tmp = $obj->tmp_name;
$err = $obj->error;
$size = $obj->size;
$ext = pathinfo( $name, PATHINFO_EXTENSION );
$width = $obj->width;
list( $w, $h, $t, $a )=getimagesize( $tmp );
$mime = image_type_to_mime_type( $t );
$height = abs( $width * ( $h / $w ) );
$dest = imagecreatetruecolor( $width, $height );
$target = rtrim( realpath( $path ), DIRECTORY_SEPARATOR ) . DIRECTORY_SEPARATOR . $new;
switch( $mime ){
case 'image/jpeg':
$image = imagecreatefromjpeg( $tmp );
imagecopyresampled( $dest, $image, 0, 0, 0, 0, $width, $height, $w, $h );
imagejpeg( $dest, $target );
break;
case 'image/png':
$image = imagecreatefrompng( $tmp );
imagecopyresampled( $dest, $image, 0, 0, 0, 0, $width, $height, $w, $h );
imagepng( $dest, $target, 9 );
break;
case 'image/gif':
$image = imagecreatefromgif( $tmp );
imagecopyresampled( $dest, $image, 0, 0, 0, 0, $width, $height, $w, $h );
imagegif( $dest, $target );
break;
default:
return 'error: '.$mime.' '.$t;
break;
}
imagedestroy( $image );
return $target;
}
}catch( Exception $e ){
throw new Exception( sprintf( 'Error:%s, Line:%d',$e->getMessage(),$e->getLine() ) );
}
}
$errors = [];
$files = [];
if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $_FILES ) ){
$width = 1920;
$path = 'c:/temp/fileuploads/';
$fields = ['uploaded_file1','uploaded_file2','uploaded_file3','uploaded_file4','uploaded_file5'];
$types = ['Boiler', 'Gas Meter', 'Pipe work', 'Flue', 'Other'];
foreach( $fields as $i => $field ){
try{
if( !empty( $_FILES[ $field ] ) ){
$obj=(object)$_FILES[ $field ];
$ext=pathinfo( $obj->name, PATHINFO_EXTENSION );
$newname=sprintf( '%s-%s.%s', str_replace( sprintf( '.%s',$ext ), '', $obj->name ), $types[ $i ], $ext );
if( $obj->error!=UPLOAD_ERR_OK )throw new Exception( sprintf( 'File upload error: %s', $obj->name ) );
/* construct argument for resize function */
$obj->newname=$newname;
$obj->width=$width;
$obj->path=$path;
/* resize the image and return the path to the files array */
$files[]=resizeImage( $obj );
}
}catch( Exception $e ){
$errors[]=$e->getMessage();
continue;
}
}
}
?>
<!DOCTYPE html>
<html lang='en'>
<head>
<meta charset='utf-8' />
<title>Multiple file upload and resize</title>
<style>
body{margin:0;padding:0;display:flex;flex-direction:column;}
body *{box-sizing:border-box;}
form{width:60%;height:auto;margin:auto;padding:1rem;}
input{width:100%;margin:auto;padding:1rem;}
</style>
</head>
<body>
<form method='post' enctype='multipart/form-data'>
<?php
for( $i=1; $i <= 5; $i++ )printf("<input type='file' name='uploaded_file%d' />",$i);
?>
<input type='submit' />
<?php
if( !empty( $files ) ){
printf('<pre><h1>Files uploaded & resized</h1>%s</pre>',print_r( $files, true ) );
}
if( !empty( $errors ) ){
printf('<pre><h1>Errors</h1>%s</pre>',print_r( $errors, true ) );
}
?>
</form>
</body>
</html>