The Gmagick::getimagesignature() function is an inbuilt function in PHP which is used to generate an SHA-256 message digest for an image.
Syntax:
string Gmagick::getimagesignature( void )
Parameters: This function does not accept any parameter.
Return Value: This function returns a string of SHA-256 hash of the file.
Below programs illustrate the Gmagick::getimagesignature() function in PHP:
Original Image 1:
Program 1:
<?php   // PHP program to illustrate getimagesignature() function $image = new Gmagick(   // Using getimagesignature() function $pixels = $image->getimagesignature();   print($pixels); ?> |
Output:
f64054f5bcb4cfb82c6126eff6d3d4e6be7d0e72d5620033442cecb4b9feabbd
Original Image 2:
Program 2:
<?php   $string = "Computer Science portal for Geeks!";   // Creating new image of above String // and add color $im = new Gmagick(); $draw = new GmagickDraw();   // Fill the color in image $draw->setFillColor(new GmagickPixel('green'));   // Set the text font size $draw->setFontSize(50);   $metrix = $im->queryFontMetrics($draw, $string); $draw->annotation(0, 40, $string); $im->newImage($metrix['textWidth'], $metrix['textHeight'],         new GmagickPixel('white'));   // Draw the image         $im->drawImage($draw); $im->setImageFormat('jpeg');   // Using getimagesignature function $pixels = $im->getimagesignature();   print($pixels); ?> |
Output:
ed79035e13153385c344d19586e98941dd336165a3ca486200097c0bd2f4188c
Reference: http://php.net/manual/en/gmagick.getimagesignature.php
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
