un-obfuscation

readable-strings.php

<?php

if ( !function_exists( 'str_ends_with' ) ) {
  function str_ends_with( $str, $end ) {
    return( @substr_compare( $str, $end, -strlen( $end ) ) == 0 );
  }
}

function mocleanr( $filename, $replace = false ) {
	if ( !is_dir( $filename ) ) {
		moclean( $filename, $replace );
		return;
	}	
	$di = new RecursiveDirectoryIterator( $filename );
	foreach ( new RecursiveIteratorIterator( $di ) as $filename => $file) {
		if ( !str_ends_with( $filename, '.php' ) ) continue;
		moclean( $filename, $replace );
	}
}

function moclean( $filename, $replace = false ) {
	if ( !str_ends_with( $filename, '.php' ) ) return;
	$lines = file( $filename );
	$re = '/(?s)\'(?:[^\'\\\\]|\\\\.)*\'|"(?:[^"\\\\]|\\\\.)*"/';
	$fcontent = '';
	print "processing: " . $filename . "\n";
	foreach( $lines  as $content ){
		preg_match_all( $re, $content, $output );
		if ( count( $output ) ) {
			foreach ( $output[ 0 ] as $line ) {
				if ( $line ) {
					$rep = eval( 'return ' . $line . ';' );
					$content = str_replace( $line, '"' . addslashes( $rep ) . '"', $content );
				}
			}
		} 
		$fcontent .= $content;
	}
	if ( $replace ) {
		file_put_contents( $filename, $fcontent );
	} else {
		print $filename . ':' . $fcontent;
	}
}