website/lib/needs.inc

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2002-02-22 06:28:07 +00:00
<?
if (!defined ('_ARRAY_')) { // Treat array handler special
define ('_ARRAY_', 1);
/*
inArray
Search an array for data
*/
function inArray ($needle, $haystack)
{
$found = false;
for ($ptr = 0; $ptr < count ($haystack); $ptr++) {
if ($haystack[$ptr] == $needle) {
$found = true;
}
}
return $found;
}
/*
addToArray
Add an element to an array
*/
function addToArray ($var, &$arr)
{
if (!inArray ($var, $arr)) {
if (isset ($arr)) {
$arr[count ($arr)] = $var;
} else {
$arr = array ($var);
}
}
}
addToArray ('array', $has);
}
if (!defined ('_LIBFUNCS_')) {
define ('_LIBFUNCS_', 1);
/*
reqIfNeeded
Require a library module if it hasn't already been.
*/
function reqIfNeeded ($libNames)
{
global $has, $needs;
$libs = explode(' ', $libNames);
for ($i = 0 ; $i < count ($libs) ; $i++ ) {
$lib = $libs[$i];
if ((inArray ($libs[$i], $needs)) && (!inArray ($libs[$i], $has))) {
include siteHome . "/lib/$libs[$i].php";
}
}
}
/*
have
Tell the library that module X is loaded
*/
function have ($libName)
{
global $has;
addToArray ($libName, $has);
}
/*
need
Load module X if it hasn't been already, taking care to retain the
integrity of the $needs array.
*/
function need ($libNames)
{
global $needs;
$libs = explode (' ', $libNames);
for ($i = 0; $i < count ($libs); $i++) {
addToArray ($libs[$i], $needs);
}
reqIfNeeded ($libNames);
}
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// Actual code for the lib -- only one "$need" allowed from main system
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if ($need) {
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addToArray ($need, $needs);
include siteHome . "/lib/$need.php";
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unset ($need);
}
} // !_LIBFUNCS_
?>