PHP | exif_imagetype() function

The exif_imagetype() function is an inbuilt function in PHP which is used to determine the type of an image.

Syntax:

int exif_imagetype( string $filename )

Parameters:This function accepts a single parameter $filename which holds the name or URL of the image.

Return Value: This function returns an interger corresponding to one of IMAGETYPE constants as given below:

  • IMAGETYPE_GIF (1)
  • IMAGETYPE_JPEG (2)
  • IMAGETYPE_PNG (3)
  • IMAGETYPE_SWF (4)
  • IMAGETYPE_PSD (5)
  • IMAGETYPE_BMP (6)
  • IMAGETYPE_TIFF_II (7)
  • IMAGETYPE_TIFF_MM (8)
  • IMAGETYPE_JPC (9)
  • IMAGETYPE_JP2 (10)
  • IMAGETYPE_JPX (11)
  • IMAGETYPE_JB2 (12)
  • IMAGETYPE_SWC (13)
  • IMAGETYPE_IFF (14)
  • IMAGETYPE_WBMP (15)
  • IMAGETYPE_XBM (16)
  • IMAGETYPE_ICO (17)
  • IMAGETYPE_WEBP (18)

Below given programs illustrate the exif_imagetype() function in PHP:
Program 1: In this example we will check the format of a image file.



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<?php
// Load an image from PNG URL
$type = exif_imagetype(
  
echo $type;
?>

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Output:

3 // which corresponds to IMAGETYPE_PNG

Program 2: In this example we will check if a image file is supported or not.

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<?php
// Load an image from JPEG URL
$type = exif_imagetype(
  
if($type > 0 || $type < 19)
{
    echo 'This is a supported image format.';
}
?>

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Output:

This is a supported image format.

Reference: https://www.php.net/manual/en/function.exif-imagetype.php

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