php中RGBA值的正则表达式

Question

This is my regular expression for RGBA value in PHP. It is supposed to accept both the percentage pattern and the non-percentage pattern.

function isValidColor_RGBA($color){


$pattern = "rgba\(
         ((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*,\s*){2}
         ((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*)
         (,\s*(0\.\d+|1))
         \)
        |rgba\(((\d|[1-9]\d|100)%\,\s?){3}(0|0?\.\d+|1|1\.0+)\)";



return (preg_match("<$pattern>", $color) == 1)? true : false;
}

This works in this JS tester: https://regex101.com/r/A2IjNO/4 but didn't work in php. What's wrong with this? Thanks in advance.

Answer 1

Can you try removing the new lines and unwanted spaces?

I tried with the below expression in www.regex101.com

^(#[\da-f]{3}|#[\da-f]{6}|rgba(((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*,\s*){2} ((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*)(,\s*(0.\d+|1)))|hsla(\s*((\d{1,2}|[1-2]\d{2}|3([0-5]\d|60)))\s*,\s*((\d{1,2}|100)\s*%)\s*,\s*((\d{1,2}|100)\s*%)(,\s*(0.\d+|1)))|rgb(((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*,\s*){2}((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*)|hsl(\s*((\d{1,2}|[1-2]\d{2}|3([0-5]\d|60)))\s*,\s*((\d{1,2}|100)\s*%)\s*,\s*((\d{1,2}|100)\s*%)))$

It seems like the new lines and spaces making issues with PHP regex validation. The expression will work on both js and PHP

I tried the below code in enter link description here

$pattern = '/^(\#[\da-f]{3}|\#[\da-f]{6}|rgba\(((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*,\s*){2} ((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*)(,\s*(0\.\d+|1))\)|hsla\(\s*((\d{1,2}|[1-2]\d{2}|3([0-5]\d|60)))\s*,\s*((\d{1,2}|100)\s*%)\s*,\s*((\d{1,2}|100)\s*%)(,\s*(0\.\d+|1))\)|rgb\(((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*,\s*){2}((\d{1,2}|1\d\d|2([0-4]\d|5[0-5]))\s*)|hsl\(\s*((\d{1,2}|[1-2]\d{2}|3([0-5]\d|60)))\s*,\s*((\d{1,2}|100)\s*%)\s*,\s*((\d{1,2}|100)\s*%)\))$/';
$color = 'rgba(222, 222, 222, 0.5)';
var_dump(preg_match($pattern, $color));

Keep in mind that you need to add white spaces. Because, you added \s before/after the comma symbols