WordPress code formatting utility

wpformat

#!/usr/bin/php
<?php

/**
 * Takes some code from STDIN, fixes whitespace according to the WordPress Coding Standards and outputs it to STDOUT
 * Usage example: wpformat < some-file.php > some-file.php
 */

// Read file from standard input
$file = '';
while (!feof(STDIN)) {
	$file .= fread(STDIN, 8192);
}

// put placeholders on lines that have preg_*() functions
global $pregs;

$pregs = array();
$file = preg_replace_callback( "#preg_.*?\n#", function($match) {
	global $pregs;

	$match = reset( $match );

	$key = "[--wp-format-" . md5( $match ) . "--]\n";
	$pregs[$key] = $match;

	return $key;
}, $file );


// add spaces after language constructs
$file = preg_replace('#(if|else|elseif|switch|for|foreach|while)\s*\(#', '\1 (', $file);

// add spaces between function arguments
$file = preg_replace('#\( *#', '( ', $file);
$file = preg_replace('# *\)#', ' )', $file);
$file = preg_replace('#\(\ +\)#', '()', $file);

// strip spaces around casts
$file = preg_replace('#\( *(bool|int|float|string|array|object) *\) *#', '(\1) ', $file);

// strip spaces when parantheses are at the beginning of the line
$file = preg_replace('#(\n\t*) +([\(\)])#m', '\1\2', $file);

// strip trailing whitespace
$file = preg_replace('#[\t ]+\n#m', "\n", $file);


// remove preg_* placeholders
$file = str_replace( array_keys( $pregs ), array_values( $pregs ), $file );

// Write to standard output
echo $file;