php-gdHow to make image grayscale
<?php
$file = '/var/www/examples/heroine.png';
$im = imagecreatefrompng($file);
imagefilter($im, IMG_FILTER_GRAYSCALE);
imagePng($im, '/tmp/image.png');ctrl + c/var/www/examples/heroine.pngpath to image to grayscale | imagecreatefrompngcreates GD image object from given PNG image |
imagefilterapplies filter to image | IMG_FILTER_GRAYSCALEconverts colors for our image to grayscale |
imagePngsaves image in PNG format to the given path | |
Usage example
<?php
$file = '/var/www/examples/heroine.png';
$im = imagecreatefrompng($file);
imagefilter($im, IMG_FILTER_GRAYSCALE);
imagepng($im, '/tmp/image.png');