Using has_image_size to check if an image size exists in WordPress

The WordPress has_image_size function checks if a specific image size has been registered in the WordPress theme or plugin. This function can be useful for determining if a particular image size is available for use before attempting to use it in a template or plugin.

Parameters accepted by the WordPress has_image_size function

  • $name (string, required): The image size to check.

The has_image_size function accepts the $name parameter, which is a string and is required. This parameter specifies the image size to check for existence.

Value returned by the has_image_size function

The has_image_size function returns a boolean value. It returns True if the image size exists, and False if it does not exist.

Examples

Example 1: How to check if a specific image size exists

if ( has_image_size( 'large' ) ) {
 // Do something if the 'large' image size exists
} else {
 // Do something else if the 'large' image size does not exist
}

The code snippet checks if the image size ‘large’ exists using the has_image_size function. If it exists, it performs a specific action; otherwise, it performs a different action.

Example 2: How to add a custom image size and check if it exists

add_image_size( 'custom-size', 300, 200, true );

if ( has_image_size( 'custom-size' ) ) {
 // Do something if the 'custom-size' image size exists
} else {
 // Do something else if the 'custom-size' image size does not exist
}

The code snippet adds a custom image size called ‘custom-size’ with a width of 300 pixels, height of 200 pixels, and crop set to true. It then checks if the ‘custom-size’ image size exists using the has_image_size function and performs specific actions based on the result.

Example 3: How to remove a custom image size if it exists

if ( has_image_size( 'custom-size' ) ) {
 remove_image_size( 'thumbnail' );
}

The code snippet checks if the image size ‘custom-size’ exists using the has_image_size function. If it exists, it removes the ‘custom-size’ image size using the remove_image_size function.

Conclusion

In conclusion, the has_image_size function is a valuable tool for WordPress developers and designers. It provides a simple way to check if a specific image size has been registered, allowing for more efficient and organized handling of images within WordPress themes and plugins. By utilizing this function, developers can ensure that their code is more robust and maintainable, leading to a better user experience for site visitors. Overall, the has_image_size function is a useful addition to the WordPress developer’s toolkit.

Related WordPress Functions

in WordPress Functions