What are the best practices for restricting file formats to only jpg and png in PHP?

To restrict file formats to only jpg and png in PHP, you can use the `$_FILES` superglobal array to check the file type before allowing it to be uploaded. You can use the `pathinfo()` function to get the file extension and then use an `if` statement to only allow jpg and png files to be uploaded. 

// Check if the file is a jpg or png before allowing upload
$allowedFormats = ['jpg', 'png'];
$fileName = $_FILES['file']['name'];
$fileExt = pathinfo($fileName, PATHINFO_EXTENSION);

if (!in_array($fileExt, $allowedFormats)) {
    echo "Only jpg and png files are allowed.";
    exit;
}

// Continue with the file upload process

Keywords

file formats jpg png restriction PHP

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