How can one determine if a URL is an image and if it exists in PHP?

To determine if a URL is an image and if it exists in PHP, you can use the getimagesize() function. This function returns an array with information about the image if the URL points to a valid image file, or false if the URL is not an image or does not exist. 

$url = 'https://example.com/image.jpg';

if (@getimagesize($url)) {
    echo 'The URL is an image and it exists.';
} else {
    echo 'The URL is not an image or it does not exist.';
}

Keywords

PHP URL image existence validation

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