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Posted by Al on 10/06/64 11:38
David Haynes wrote:
> function find_word($array, $word) {
> // for every set of arrays
> for( $i=0; $i < count($array); $i++ ) {
> // foreach element in the array expressed as $a
> foreach( $m[$i] as $a ) {
> // is $a the word we are looking for?
> if( $a == $word ) {
> // yes, return the index into $m
> return $i;
> }
> }
> }
> // not found in $m
> return -1;
> }
I'd cut that down using good old in_array():
<?php
$m = array();
$m[0] = array("lodgings", "rooms");
$m[1] = array("location", "there and away");
$m[2] = array("functions", "events and groups");
$m[3] = array("activities", "things to do", "exclusive activities");
$m[4] = array("enquiries", "tariffs");
$m[5] = array("download", "media info");
echo ext_array_search("download", $m);
function ext_array_search($needle, $haystack) {
// go through each key
foreach ($haystack as $key => $straw) {
// if the current key's array contains our value, return the
key's number
if (in_array($needle, $straw)) return $key;
}
// nothing found so return a standard error code
return -1;
}
?>
> The &$array says that the array is passed by reference not by value.
> When called this way, any changes to the contents of $array in the
> function affect the $array in the calling process. This allows you to
> pass back more than one value when a function returns or to modify the
> contents of a variable in situ.
Specifically here it means that the function can set the array's
"current entry" pointer to the key you pass it as a parameter rather
than having to return a NEW copy of the array with the pointer set.
And that function just iterates through the array's keys until it gets
to the one that you pass it, so won't actually help with what you're
looking for.
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