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<?php
function file_is_valid_image($path) {
    $size = @getimagesize($path);
    return !empty($size);
}
?>

• file_is_valid_image() WordPress function reference, arguments and ...
  Validate that file is an image. Signature. file_is_valid_image( $path ). path: (string ) File path to test if valid image. Return. (boolean) True if valid image, false if ...
  queryposts.com
• Determining if file is valid image file - Python
  Other than installing PIL, is there a "simple" way using Python only to determine if a file is a valid image file? I'd be happy if I could at least identify ...
  bytes.com
• PHPXRef 0.7 : WordPress : Detail view of image.php
  wp_crop_image() wp_generate_attachment_metadata() get_udims() wp_exif_frac2dec() wp_exif_date2ts() wp_read_image_metadata() file_is_valid_image() ...
  phpxref.ftwr.co.uk
• Docs for page image.php
  file_is_valid_image (line 330). Validate that file is an image. return: True if ... bool file_is_valid_image (string $path). string $path: File path to test if valid image.
  phpdoc.wordpress.org

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