geckon01/simple-image-compressor
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Better image type recognition with exif

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DESKTOP-H825VC6\geckon01
2023-10-17 02:00:17 +03:00
parent 10338aec18
commit de877f3b6a
1 changed files with 39 additions and 7 deletions
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src/SimpleImageCompressor.php
+39 -7
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@@ -24,14 +24,17 @@ class SimpleImageCompressor
private int $approxMinimumHeight = 90; private int $approxMinimumHeight = 90;
private int $approxMinimumWidth = 90; private int $approxMinimumWidth = 90;
private bool $exifLoaded = false;
/** /**
* SimpleImageCompressor constructor. * SimpleImageCompressor constructor.
* @param $url * @param $url url or path from where to load file
*/ */
private function __construct($url) private function __construct($url)
{ {
$this->imageResourceUrl = $url; $this->imageResourceUrl = $url;
$this->exifLoaded = in_array("exif", get_loaded_extensions());
} }
@@ -82,17 +85,46 @@ class SimpleImageCompressor
* Determine current loaded image type * Determine current loaded image type
*/ */
private function loadImageType() { private function loadImageType() {
$filetype = ''; $this->imageType = "image";
if($this->exifLoaded)
{
switch (exif_imagetype($this->imageResourceUrl))
{
case IMAGETYPE_GIF:
$this->imageType = 'image/gif';
break;
case IMAGETYPE_JPEG:
$this->imageType = 'image/jpeg';
break;
case IMAGETYPE_PNG:
$this->imageType = 'image/png';
break;
case IMAGETYPE_BMP:
$this->imageType = 'image/bmp';
break;
case IMAGETYPE_WEBP:
$this->imageType = 'image/webp';
break;
case IMAGETYPE_ICO:
$this->imageType = 'image/ico';
break;
default:
break;
}
return;
}
//Fallback to bytes recognition
trigger_error("simple-image-compressor: Exif extension not found. Image MIME type recognition may be inaccurate.");
if (substr($this->imageData, 0, 2) === "\xFF\xD8") { if (substr($this->imageData, 0, 2) === "\xFF\xD8") {
$filetype = 'image/jpeg'; $this->imageType = 'image/jpeg';
} else if (substr($this->imageData, 0, 3) === "\x89\x50\x4E") { } else if (substr($this->imageData, 0, 3) === "\x89\x50\x4E") {
$filetype = 'image/png'; $this->imageType = 'image/png';
} else if (substr($this->imageData, 0, 4) === "\x47\x49\x46\x38") { } else if (substr($this->imageData, 0, 4) === "\x47\x49\x46\x38") {
$filetype = 'image/gif'; $this->imageType = 'image/gif';
} }
$this->imageType = $filetype;
} }
/** /**