The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog | 
|---|---|---|---|
| gd.jpeg_ignore_warning | "1" | PHP_INI_ALL | Available since PHP 5.1.3. | 
Here's a short explanation of the configuration directives.
gd.jpeg_ignore_warning
     bool
    Ignore warnings (but not errors) created by libjpeg(-turbo).
| Version | Description | 
|---|---|
| 7.1.0 | The default of gd.jpeg_ignore_warning has been changed from 0 to 1. | 
See also the exif configuration directives.
Image functions are very memory intensive. Be sure to set memory_limit high enough, if you are using the bundled version of the GD library.