Solved

Iterating through an array, check if a a value and if it meets conditions continue iterating while ignoring keys with the same value

Posted on 2011-09-28
2
191 Views
Last Modified: 2012-05-12
Hi,

I have an an array, which I reversed to give the following result:

Array
(
    [0] => nameOrder=1
    [1] => nameOrder=0
    [2] => priceOrder=1
    [3] => http://lsomedomain/somecategory
)

The values I want to check for are nameOrder,priceOrder

I want to iterate through it and record (in another array) the key for the first time I find an occurence of nameOrder and priceOrder. When I find a match, I ingore any other occurences - in this case [1]. So in this example the resulting array would be

array {
    [0] => 0
    [1] => 2
}

Had a look at using array_walk but not having much luck.

Any help much appreciated!

Cheers,

Daisy
0
Comment
Question by:daisydoos
  • 2
2 Comments
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 36718631
You can use foreach() to iterate over arrays.
0
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 36718716
http://www.laprbass.com/RAY_temp_daisydoos.php
<?php // RAY_temp_daisydoos.php
error_reporting(E_ALL);

// FIND THINGS IN AN ARRAY AND SHOW THE KEYS

// CREATE THE TEST DATA
$arr = array
( 'nameOrder=1'
, 'nameOrder=0'
, 'priceOrder=1'
, 'http://lsomedomain/somecategory'
)
;

// THE THINGS WE WANT TO FIND
$xyz = array
( 'nameOrder'
, 'priceOrder'
)
;

// A PLACE TO KEEP WHAT WE FIND
$out = array();

// USE THE ITERATOR TO ACCESS THE TEST DATA
foreach ($arr as $num => $thing)
{
    // USE ANOTHER ITERATOR TO ACCESS THE SEARCH STRINGS
    foreach ($xyz as $ptr => $key)
    {
        // IF WE FIND A SEARCH STRING
        if (strpos($thing, $key) !== FALSE)
        {
            // SAVE THE KEY NUMBER, AND STOP LOOKING FOR THIS SEARCH STRING
            $out[] = $num;
            unset($xyz[$ptr]);
            if (empty($xyz)) break;
        }
    }
}

// SHOW THE WORK PRODUCT
echo "<pre>";
print_r($arr);
echo PHP_EOL;
print_r($out);

Open in new window

0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit (http://en.wikipedia.org/wiki/PHPUnit) and similar technologies have enjoyed wide adoption, making it possib…
Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question