Creating and reading multi-dimentional arrays

[bigc79]

I'm looking at creating a a multi dimentional array with two variables... "keyword" and "url" I then want to be able to search the array for a keyword and if the keyword exists return the url.

This may seem simple to some of you but it has stumped me.

Can anyone assist?

This is what i have at the moment.. but i can't get it to work...

	$redirect_array = array();

$redirect_array[0]["keyword"] = "keyword1";
$redirect_array[0]["url"] = "url1";

$redirect_array[1]["keyword"] = "keyword2";
$redirect_array[1]["url"] = "url2";

$redirect_array[2]["keyword"] = "keyword3";
$redirect_array[2]["url"] = "url3";

$redirect_array_size = count($redirect_array);
for ($index = 0; $index < $redirect_array_size; $index++)
{
	$keyword_var = array_pop($redirect_array[$index]);
	if ($keyword_var == "url2")
	{
		$redirect__url_array[] = $redirect_array[$index];
		$redirect_array_url_result = array_pop($redirect__url_array);
		echo $redirect_array_url_result . " ..line..<br>";
	}
}

any thoughts?

[bigc79]

Has anyone got any ideas on this one?

Bigc79

[cahva]

Try something like this:

<?php
$redirect_array = array();

$redirect_array[0]["keyword"] = "keyword1";
$redirect_array[0]["url"] = "url1";

$redirect_array[1]["keyword"] = "keyword2";
$redirect_array[1]["url"] = "url2";

$redirect_array[2]["keyword"] = "keyword3";
$redirect_array[2]["url"] = "url3";
$searchstring="keyword2";

while (list ($key) = each ($redirect_array)) {
	while (list ($key2, $val) = each ($redirect_array[$key])) {
		if (strstr($val,$searchstring))
		{
			echo "$searchstring url is: ".$redirect_array[$key]['url'];
		}
	}
}
?>

Im sure theres a better way, but I got no interest at the moment to investigate...

[bigc79]

Hi there cahva and others,

that does kind of work... except when i search for say the work "key" it returns 3 answers because if it is doing a string search and the word key exists in "keyword" the other issue is that if i type in url it also returns 3 answers because url appears as part of the search key.

Do you know of a way of making it so that my search limits to
a) just the keyword and not the url part of the array and
b) makes it so that my search is not returning part of a search so if my keyword was "this is great" and there was another keyword "this" that ONLY "this is great" is returned if the search is "this is great"... i may need to do this as a regular experession.. if so i know how to do this.

Thanks for the help

BigC79

[cahva]

Ok, instead of using strstr use:
if ($val==$searchstring && $key=='keyword')

[Weedpacket]

I couldn't figure out why there were two loops:

function findurl($redirect_array,$keyword)
{	$matchedurls = array();
	foreach($redirect_array as $keyword_url_pair)
		if($keyword_url_pair['keyword']==$keyword)
			$matched_urls[]=$keyword_url_pair['url'];
	return $matched_urls;
}


findurl($redirect_array, 'this is great');

You get an array of URLs with matching keywords. If there is only going to be one URL per possible keyword, it can be simplified and sped up thus:

function findurl($redirect_array,$keyword)
{	$matchedurls = array();
	foreach($redirect_array as $keyword_url_pair)
		if($keyword_url_pair['keyword']==$keyword)
			return$keyword_url_pair['url'];
}


findurl($redirect_array, 'this is great');

This time you get a string instead of an array.

[cahva]

Originally posted by Weedpacket
I couldn't figure out why there were two loops:

Me neither 🙂 But as I said before, there must be a better way of doing this and there was!

[bigc79]

Thanks for that one...

y'all are stars... much appriciated.

BigC