Extract process name by PID

pid2proc.php

/**
 * Get process by pid Windows|Linux
 *
 * @param int $pid PID or 0 to reset cache
 * @param bool $disable_cache Disable cache for extracted process list (very slow)
 *
 * @return false|string
 */
function pid2proc( int $pid = 0, $disable_cache = false ) {
	static $cache;

	if ( $cache === null || $pid === 0 || $disable_cache ) { // reset cache
		$cache = [];
		// Windows ?
		if ( strpos( PHP_OS, 'WIN' ) !== false ) {
			exec( 'tasklist.exe /FO CSV', $output );
			// "phpstorm64.exe","11500","Console","1","1239992 КБ"
			foreach ( $output as $line ) {
				$line           = str_replace( '"', '', $line );
				$a              = explode( ',', $line );
				if ( is_numeric( $a[1]) && $a[1] > 0 ) {
					$cache[ $a[1] ] = $a[0];
				}
			}
		} else {
			exec( 'ps auxw', $output );
			// root      1014  0.0  0.0  13020   772 ?        Ssl Sep08   0:01 auditd
			foreach ( $output as $line ) {
				$line = preg_replace( '/\s+/', ' ', $line );
				$a    = explode( ' ', $line, 11 );
				if ( is_numeric( $a[1] ) && $a[1] > 0) {
					$cache[ $a[1] ] = $a[10];
				}
			}
		}
	}
	return isset($cache[ $pid ]) ? $cache[ $pid ] : false;
}