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<?php
/*
* File: ratatoeskr/sys/utils.php
*
* Various useful helper functions.
*
* License:
* This file is part of Ratatöskr.
* Ratatöskr is licensed unter the MIT / X11 License.
* See "ratatoeskr/licenses/ratatoeskr" for more information.
*/
/*
* Function: array_repeat
*
* Parameters:
*
* $val -
* $n -
*
* Returns:
*
* An array with $val $n-times repeated.
*/
function array_repeat($val, $n)
{
$rv = array();
for($i = 0; $i < $n; ++$i)
array_push($rv, $val);
return $rv;
}
/*
* Function: array_blend
*
* Blend multiple arrays together.
*
* Example:
*
* array_blend(array(1,2,3), array(4,5,6), array(7,8,9));
* will return array(1,4,7,2,5,8,3,6,9)
*/
function array_blend()
{
$arrays = array_filter(func_get_args(), "is_array");
switch(count($arrays))
{
case 0: return array(); break;
case 1: return $arrays[0]; break;
default:
$rv = array();
while(array_sum(array_map("count", $arrays)) > 0)
{
for($i = 0; $i < count($arrays); ++$i)
{
$val = array_shift($arrays[$i]);
if($val === NULL)
continue;
array_push($rv, $val);
}
}
return $rv;
break;
}
}
/*
* Function: array_filter_empty
*
* Filters all empty elements out of an array.
*
* Parameters:
*
* $input - The input array
*
* Returns:
*
* The $input without its empty elements.
*/
function array_filter_empty($input)
{
return array_filter($input, function($x){return !empty($x);});
}
/*
* Function: array_filter_keys
*
* Like PHPs `array_filter`, but callback will get the key, not the value of the array element.
*/
function array_filter_keys($input, $callback)
{
if(!is_array($input))
throw new InvalidArgumentException("Argument 1 must be an array");
if(empty($input))
return array();
$delete_keys = array_filter(array_keys($input), function ($x) use ($callback) { return !$callback($x);});
foreach($delete_keys as $key)
unset($input[$key]);
return $input;
}
/*
* Function: array_kvpairs_to_assoc
* Convert array of key-value pairs to an associative array.
*
* Parameters:
* $input - Array of key-value pairs
*
* Returns:
* An associative array.
*/
function array_kvpairs_to_assoc($input)
{
$rv = array();
foreach($input as $kvpair)
$rv[$kvpair[0]] = $kvpair[1];
return $rv;
}
/*
* Function: intcmp
* Compare integers (equavilent to strcmp)
*/
function intcmp($a, $b)
{
return ($a == $b) ? 0 : (($a < $b) ? -1 : 1);
}
/*
* Function: ucount
*
* Count elements of an array matching unser-defined rules.
*
* Parameters:
* $array - The input array.
* $callback - A callback function. It will be called with the current value as the only parameter. The value is counted, if callback returns TRUE.
*
* Returns:
*
* Number of elements where $callback returned TRUE.
*/
function ucount($array, $callback)
{
return count(array_filter($array, $callback));
}
/*
* Function: vcount
*
* Counts how often $value appears in $array.
*
* Parameters:
*
* $array -
* $value -
*
* Returns:
*
* How often $value appears in $array.
*/
function vcount($array, $value)
{
return ucount($array, function($x){return $x===$value;});
}
/*
* Function: self_url
*
* Gets current URL.
*
* From: http://dev.kanngard.net/Permalinks/ID_20050507183447.html
*/
function self_url() {
$s = empty($_SERVER["HTTPS"]) ? ''
: ($_SERVER["HTTPS"] == "on") ? "s"
: "";
$protocol = strleft(strtolower($_SERVER["SERVER_PROTOCOL"]), "/").$s;
$port = ($_SERVER["SERVER_PORT"] == "80") ? ""
: (":".$_SERVER["SERVER_PORT"]);
return $protocol."://".$_SERVER['SERVER_NAME'].$port.$_SERVER['REQUEST_URI'];
}
function strleft($s1, $s2) {
return substr($s1, 0, strpos($s1, $s2));
}
/*
* Function: htmlesc
* Escape HTML (shorter than htmlentities($text, ENT_QUOTES, "UTF-8"))
*
* Parameters:
* $text - Input text.
*
* Returns:
* HTML
*/
function htmlesc($text)
{
return htmlentities($text, ENT_QUOTES, "UTF-8");
}
/*
* Constant: SITE_BASE_PATH
* The Base path of this ratatoeskr site.
*/
define("SITE_BASE_PATH", dirname(dirname(dirname(__FILE__))));
?>
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