increase image upload size wordpress code example

Example 1: create custom image size wordpress

add_image_size( 'custom-size', 220, 180 ); // 220 pixels wide by 180 pixels tall, soft proportional crop mode

add_image_size( 'custom-size', 220, 180, true ); // 220 pixels wide by 180 pixels tall, hard crop mode

add_image_size( 'custom-size', 220, 220, array( 'left', 'top' ) ); // Hard crop left top

Example 2: increase upload size wordpress

php_value upload_max_filesize 64M
php_value post_max_size 64M
php_value max_execution_time 300
php_value max_input_time 300