Minify inner CSS string

minifyStyle.js

/*
 * Applicable to strings which would go inside a style property of an element, like so:
 * element.setAttribute("style",minifyStyle(`margin : 0px 5px 4px  10px;`)); // This would remove 4 unnecessary spaces from the string
 */
 
const minifyStyle = (s, mode=0) => s.replace(/(\r\n|\t|\n|\r)/gm,"").split('').filter((char, index) => (((((mode == 1)&&(mode = 2))||true)&&(((char == ':')&&(mode = 1))||true)&&(char == ';')&&(mode = 0)||true)&&mode == 0)?(char !== ' '):((mode == 2)?((mode = 3)&&(char != ' ')):true)).join('');

minifyStyle(`margin-top: 5px;
  margin: 5px 5px 5px 6px;
  background-image: url(...) center center no-repeat;
`);

// Returns: "margin-top:5px;margin:5px 5px 5px 6px;background-image:url(...) center center no-repeat;"

minifyStyle.php

<?php
/*
 * Applicable to strings which would go inside a style property of an element, like so:
 * element.setAttribute("style",minifyStyle(`margin : 0px 5px 4px  10px;`)); // This would remove 4 unnecessary spaces from the string
 */
function minifyStyle($content) {
		$mode = 0;
		$clean = preg_replace("/(\r\n|\t|\n|\r)/m","", $content);
		$exploded = str_split($clean);
		$filtered = "";
		foreach($exploded as $char) {
			if ($mode == 0 || $mode == 2 || $mode === 1) {
				if ($mode === 1) {
					$mode = 5;
				} elseif ($char == ":") {
					$mode = 1;
				} elseif ($char === "/" && $mode === 0) {
					$mode = 2;
				} elseif ($char === "*" && $mode === 2) {
					$mode = 3;
				} elseif ($mode === 2) {
					$mode = 0;
				}
				if ($char !== ' ') {
					$filtered .= $char;
				}
			} elseif ($mode === 5) {
				if ($char == ";") {
					$mode = 0;
				}
				$filtered .= $char;
			} elseif ($mode === 3 || $mode == 4) {
				if ($char === "*" && $mode === 3) {
					$mode = 4;
				} else if ($char === "/" && $mode === 4) {
					$mode = 0;
					$filtered .= "/\n";
					continue;
				} else if ($mode === 4) {
					$mode = 3;
				}
				$filtered .= $char;
			}
		};
		return $filtered;
	}

?>