simple function to read code and print in pretty format

mlt_read_code.php

<?php
function mlt_valida_input($input) {
	$pattern = '[^A-Za-z0-9.]';
	return ereg($pattern, $input);
}

function mlt_read_code($input) {
	if (mlt_valida_input($input))
		return 1;
	
	if (!($fp = fopen($input, "r")))
		return 1;

	print "<br/>";
	print "<span style='display:block; background: #e0e0f0; width: 550px; font-size: 10px;'>.:.:. init source code: '$input'</span>";

	$lines = 0;
	$pattern = "/(if |while | do |elif |^fi|else |then|while |do |return)/";

	while (($buffer = fgets($fp, 4096))) {
		$buffer[strlen($buffer)-1] = ' '; 
		$buffer = preg_replace('/\t/', '&nbsp;&nbsp;&nbsp;&nbsp;', $buffer);
		$buffer = preg_replace('/</', '&lt;', $buffer);
		$buffer = preg_replace("$pattern", '<b>\\1</b>', $buffer);
		
		if (!($lines % 2))
			$bg = "#e0e0e0";
		else
 			$bg = "#f0f0f0";
		
		printf("<span style='display: block; background: %s; width: 550px; font-size: 10px;'>%03d . %s</span>\n",
			$bg, $lines, $buffer);
		$lines++;
	}
	print "<span style='display:block; background: #e0e0f0; width: 550px; font-size: 10px;'>.::.::. end source code: '$input'</span>";
	print "<br/>";

	fclose($fp);
}
?>