<?
/**
 * @return string
 * @param string $haystack Text To Parse
 * @param string $bfstarttext start string
 * @param string $endsection end string
 * @desc return the string included between $bfstarttext and $endsection
*/
function stripfromtext($haystack, $bfstarttext, $endsection) {
	$startpostext = $bfstarttext;
	$startposlen = strlen($startpostext);
	$startpos = strpos($haystack, $startpostext);
	$endpostext = $endsection;
	$endposlen = strlen($endpostext);
	$endpos = strpos($haystack, $endpostext, $startpos);
	return substr($haystack, $startpos + $startposlen, $endpos - ($startpos + $startposlen));
}

/**
 * @return array
 * @param string $haystack Text To Parse
 * @param string $bfstarttext start string
 * @param string $endsection end string
 * @desc return an array of the strings included between $bfstarttext and $endsection
*/
function &stripfromtextarray($haystack, $bfstarttext, $endsection, $myarray=array(), $offset=0) {
	$startpostext = $bfstarttext;
	$startposlen = strlen($startpostext);
	$startpos = strpos($haystack, $startpostext, $offset);
	$endpostext = $endsection;
	$endposlen = strlen($endpostext);
	$endpos = strpos($haystack, $endpostext, $startpos);
	$myarray[] = substr($haystack, $startpos + $startposlen, $endpos - ($startpos + $startposlen));
	$offset = $endpos;
	if (is_numeric(strpos($haystack, $startpostext, $offset))) {
		return stripfromtextarray($haystack,$startpostext, $endpostext, &$myarray, $offset);
	}else{
		return $myarray;
	}
}

/**
 * @return string
 * @param int $len lunghezza
 * @desc return a string random
*/
function random_string($min=10,$max=25){
	$pass = NULL; $lchar=NULL;
	$len = rand($min,$max);
	for($i=0; $i<$len; $i++) {
		$char = chr(rand(48,122));
		while (!ereg("[a-zA-Z0-9]", $char)){
			if($char == $lchar) 
				continue;
			$char = chr(rand(48,90));
		}
		$pass .= $char;
		$lchar = $char;
	}
	return $pass;
}

/**
 * @return int
 * @param int $len lunghezza
 * @desc return an int random
*/
function random_int($min=10,$max=25){
	$randnum = "";
	$len = rand($min,$max);
	for ($i=0;$i<$len;$i++){
		$randnum .= rand(0, 9);
	}
	return $randnum;
}

/**
 * @return string
 * @param string $str Text To Capitalize
 * @param int $index first word to capitalize
 * @desc Capitalze a string
*/
function capitalize($str,$index=0){
	$arrstr = explode(" ",$str);
	$begin = substr($arrstr[$index],0,1);
	$end = substr($arrstr[$index],1,strlen($arrstr[$index]));
	$arrstr[$index] = strtoupper($begin).$end;
	return implode(" ",$arrstr);
}

function do_bytes($size) {
	$kb = 1024;        // Kilobyte
	$mb = 1024 * $kb;  // Megabyte
	$gb = 1024 * $mb;  // Gigabyte
	$tb = 1024 * $gb;  // Terabyte
	if($size==0) $size = "0.1";
	if($size < $kb) {
		$s = $size; $um = "b";
	} else if($size < $mb) {
		$s = round($size/$kb,2); $um = "Kb";
	} else if($size < $gb) {
		$s = round($size/$mb,2); $um = "Mb";
	} else if($size < $tb) {
		$s = round($size/$gb,2); $um = "Gb";
	} else {
		$s = round($size/$tb,2); $um = "Tb";
	}
	return array("size"=>$s, "um"=>$um);
}

/**
 * @return array 
 * @param $arr array
 * @param $value string
 * @param $bPreserveKeys bool
 * @desc Remove an element from the array preserving key=>val association if not different specified
 */
function array_remove($arr,$value,$bPreserveKeys=true){
    $ret = array(); $y = 0;
    foreach($arr as $k=>$val){
        if($val!=$value){
			if($bPreserveKeys) $ret[$k] = $val;
            else $ret[] = $val;
        }
    }
    return $ret;
}

function getHexColor($color){
	$return = array();
	for($i=0; $i<count($color); $i++){
		$return[] = sprintf("%02s",dechex(floor($color[$i] * 255)));
	}
	return $return;
}

/**
 * @return string parsed
 * @param string $path path/to/data like XPath
 * @param string $string XML string
 * @param string $separator path-separator(/) 
 */
function parsexml($path,$string,$separator="/"){
	$levels = explode($separator,$path);
	if(count($levels)>0){
		$node = $levels[0];
		$xml = stripfromtext($string,"<".$node.">","</".$node.">");
		if(count($levels)==1)
			return $xml;
		else {
			array_shift($levels);
			return parsexml(implode("/",$levels),$xml,$separator);
		}
	}
}

/**
 * @return first position of the last coccurence of a string
 * @param string $haystack
 * @param string $needle string to search
 * @param string $offset
 */
function my_strrpos($haystack, $needle, $offset=0) {
   // same as strrpos, except $needle can be a string
   $strrpos = false;
   if (is_string($haystack) && is_string($needle) && is_numeric($offset)) {
       $strlen = strlen($haystack);
       $strpos = strpos(strrev(substr($haystack, $offset)), strrev($needle));
       if (is_numeric($strpos)) {
           $strrpos = $strlen - $strpos - strlen($needle);
       }
   }
   return $strrpos;
}


?>