PHP provides various functions and DLL to extract image properties from an image.
These functions are,
1. imagesx() and imagesy()
2. getimagesize()
3. exif_read_data()

The imagesy() is the function to be used to get the image height in PHP. It returns the height of the image or FALSE on errors.

Syntax

imagesy(img)

The following is an example:

<?php
  $img = imagecreatetruecolor(450, 250);
  echo imagesy($img);
?>

Output
The following is the output:

250