PHP snippets

boolval.php

if (!function_exists('boolval'))
	{
	function boolval($b)
		{
		if (is_bool($b)) return $b;
		if ($b == null) return false;
		if (is_string($b))
			{
			if (!$b) return false;
			$ch = strtolower($b[0]);
			return ($ch == 't') || ($ch == 'y') || intval($ch) > 0;
			}
		else if (is_numeric($b))
			{
			return $b != 0;
			}
		return true;
		}
	}

contentTypes.php

header('Content-Type: application/json');

enable_debug.php

ini_set('display_errors',1);
error_reporting(E_ALL);

getBaseUrl.php

function getBaseUrl()
	{
	$port = $_SERVER['SERVER_PORT'];
	$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $port == 443) ? "https://" : "http://";
	$domain = $_SERVER['HTTP_HOST'];
	$path = dirname($_SERVER["REQUEST_URI"]);
	return $protocol.$domain.($port == 80 || $port == 443? '': ':'.$port).$path;
	}

getValueSafely.php

// Get content of associative array safely, with optional default value

function val($array, $key, $default = null)
	{
	if (!$array) return $default;
	if (!isset($array[$key])) return $default;
	return $array[$key];
	}

good_ways_to_die.php

function die404($msg = null)
	{
	header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found", true, 404);
	header("Status: 404 Not Found");
	$_SERVER['REDIRECT_STATUS'] = 404;
	echo $msg? $msg: 'Your requested resource is not found';
	die();
	}

function die500($msg = null)
	{
	header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error', true, 500);
	echo $msg? $msg: 'An internal server error has occurred.';
	die();
	}

json_encode_utf8.php

function TSUtf8CharFromNumber($num)
  {
  if($num<=0x7F)       return chr($num);
  if($num<=0x7FF)      return chr(($num>>6)+192).chr(($num&63)+128);
  if($num<=0xFFFF)     return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
  if($num<=0x1FFFFF)   return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128).chr(($num&63)+128);
  return '';
  }


function TSUnescapeUtf8Char($text)
	{
	return preg_replace_callback('/\\\\u([0-9a-f]{4})/i', create_function('$matches', 'return TSUtf8CharFromNumber(hexdec($matches[1]));'), $text);
	}

normalizeSpaces.php

function normalizeSpaces($str)
	{
	return preg_replace('!\s+!', ' ', trim($str));
	}

stringUtils.php

function hasPrefix($haystack, $needle)
	{
	return $needle === '' || strpos($haystack, $needle) === 0;
	}


function hasSuffix($haystack, $needle)
	{
	return $needle === '' || substr($haystack, -strlen($needle)) === $needle;
	}

TSUtils.php

_

uuidv4.php

/**
 * Generate VALID RFC 4211 COMPLIANT Universally Unique IDentifiers (UUID) version 4. Version 4 UUIDs are pseudo-random. 
 */
function uuidv4()
	{
	return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
		
		// 32 bits for "time_low"
		mt_rand(0, 0xffff), mt_rand(0, 0xffff),
		
		// 16 bits for "time_mid"
		mt_rand(0, 0xffff),
		
		// 16 bits for "time_hi_and_version",
		// four most significant bits holds version number 4
		mt_rand(0, 0x0fff) | 0x4000,
		
		// 16 bits, 8 bits for "clk_seq_hi_res",
		// 8 bits for "clk_seq_low",
		// two most significant bits holds zero and one for variant DCE1.1
		mt_rand(0, 0x3fff) | 0x8000,
		
		// 48 bits for "node"
		mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
		);
	}