How does the imagecreatefrompng function behave when loading images that were saved in a different format than the original?

When using the imagecreatefrompng function to load images that were saved in a different format than the original (e.g., a JPEG file saved as a PNG), the function will not be able to properly read the file and will return false. To solve this issue, you can first check the file extension before loading the image and then use the appropriate imagecreatefrom function based on the file type. 

$filename = 'image.jpg'; // example file name
$extension = pathinfo($filename, PATHINFO_EXTENSION);

if ($extension == 'png') {
    $image = imagecreatefrompng($filename);
} elseif ($extension == 'jpeg' || $extension == 'jpg') {
    $image = imagecreatefromjpeg($filename);
} else {
    // handle unsupported file types or other errors
}

Keywords

imagecreatefrompng image format conversion compatibility error handling

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