Function and usage of maybe_hash_hex_color() in wordpress


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    The maybe_hash_hex_color() function in WordPress is used to ensure that a hex color value is properly prefixed with a hash (#) symbol. Here's a detailed explanation and sample usage of the function:


    maybe_hash_hex_color( string $color ): string


    The primary purpose of this function is to ensure consistency in the format of hex color values used in WordPress. Hex colors are often used in web design for specifying colors, and they typically consist of a hash symbol followed by a 3 or 6-digit hexadecimal number. This function guarantees that the hex color value is correctly formatted with the hash prefix.


    • The function checks if the provided hex color string ($color) starts with a hash (#). If it does not, the function adds the hash at the beginning of the string.
    • If the $color string already starts with a hash, or if the string is not a valid hex color, the function returns the value as it is, without any modification.
    • This function is particularly useful in scenarios where you have sanitized the color value using sanitize_hex_color_no_hash() and need to ensure the hash is added back for proper formatting.


    • $color (string) (required): The hex color value to be processed. This value may or may not start with a hash symbol.


    • (string): The function returns the hex color string, ensuring it starts with a hash symbol. If the input is not a valid hex color, it returns the input unchanged.

    Sample Usage:

    // Example hex color values
    $color1 = "ff5733"; // Without hash
    $color2 = "#33aaff"; // With hash
    // Ensuring proper hash prefix
    $hashedColor1 = maybe_hash_hex_color($color1); // Returns "#ff5733"
    $hashedColor2 = maybe_hash_hex_color($color2); // Returns "#33aaff" (unchanged)
    // Displaying the results
    echo $hashedColor1; // Outputs: #ff5733
    echo $hashedColor2; // Outputs: #33aaff

    In this example, $color1 does not start with a hash, so the function adds it. For $color2, which already has a hash, the function returns the value as it is. This ensures that both color values are properly formatted for use in a web context.

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