Function and usage of image_make_intermediate_size() in wordpress

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    2024-01-08T18:16:02+00:00

    The image_make_intermediate_size() function in WordPress is used for resizing an image to create a thumbnail or an intermediate size. This function is particularly useful when you need to generate different sizes of an image for various purposes on your website, like thumbnails, previews, or specific layout requirements.

    Function Signature:

    image_make_intermediate_size( string $file, int $width, int $height, bool|array $crop = false ): array|false
    

    Description:

    • Purpose: The primary function of image_make_intermediate_size() is to resize an image. When an image is resized, this function also returns important metadata about the resized image, such as its new dimensions and file size.
    • Return Value: It returns an array with the resized image file's details, including file size, width, and height. If the resizing process fails or if no image is created, it returns false.

    Parameters:

    1. $file (string, required): The path to the file that needs to be resized. This should be a valid image file path on the server.
    2. $width (int, required): The desired width of the image in pixels.
    3. $height (int, required): The desired height of the image in pixels.
    4. $crop (bool|array, optional): Determines the cropping behavior of the image. Its behavior depends on the value:
      • If set to false, the image will be scaled to the new dimensions while maintaining its aspect ratio (default behavior).
      • If set to true, the image will be cropped to the exact specified dimensions, using the center position for cropping.
      • If an array is provided, it specifies the crop position. The array should have two string values: the x crop position ('left', 'center', or 'right') and the y crop position ('top', 'center', or 'bottom').
      • Default value is false, which means scaling without cropping.

    Sample Usage:

    Here's an example of how to use image_make_intermediate_size():

    $file_path = '/path/to/image.jpg';
    $width = 150;
    $height = 100;
    $crop = array( 'center', 'top' );
    
    $resized_image = image_make_intermediate_size($file_path, $width, $height, $crop);
    
    if ( $resized_image ) {
        echo "Image resized successfully. Metadata: ";
        print_r($resized_image);
    } else {
        echo "Failed to resize image.";
    }
    

    In this example, the image at $file_path will be resized to 150x100 pixels. The cropping is set to crop from the center and top of the image. If successful, it prints the metadata of the resized image; otherwise, it outputs a failure message.

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