function color_valid_hexadecimal_string
color_valid_hexadecimal_string($color)
Determines if a hexadecimal CSS color string is valid.
Parameters
string $color: The string to check.
Return value
bool TRUE if the string is a valid hexadecimal CSS color string, or FALSE if it isn't.
File
- core/modules/color/color.module, line 349
- Allows users to change the color scheme of themes.
Code
function color_valid_hexadecimal_string($color) { return preg_match('/^#([a-f0-9]{3}){1,2}$/iD', $color); }
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https://api.drupal.org/api/drupal/core!modules!color!color.module/function/color_valid_hexadecimal_string/8.1.x