检查已安装的GD版本是否支持特定图像类型

原型

gd_edit_image_support( string $mime_type )

参数

$mime_type (string) (Required)

返回值

(bool)  

源文件

路径:wp-includes/deprecated.php

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<?php
...
function gd_edit_image_support($mime_type) {
	_deprecated_function( __FUNCTION__, '3.5.0', 'wp_image_editor_supports()' );

	if ( function_exists('imagetypes') ) {
		switch( $mime_type ) {
			case 'image/jpeg':
				return (imagetypes() & IMG_JPG) != 0;
			case 'image/png':
				return (imagetypes() & IMG_PNG) != 0;
			case 'image/gif':
				return (imagetypes() & IMG_GIF) != 0;
		}
	} else {
		switch( $mime_type ) {
			case 'image/jpeg':
				return function_exists('imagecreatefromjpeg');
			case 'image/png':
				return function_exists('imagecreatefrompng');
			case 'image/gif':
				return function_exists('imagecreatefromgif');
		}
	}
	return false;
}

...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/gd_edit_image_support/