Very roughly..... $rows = array(); $rows[0] = array(4,11,24,26,36,38,45,35,44,48); $rows[1] = array(1,0,13,9,35,33,47,25,39,55); ...etc,etc This gives you a known list to work with. Now you can loop through the rows. $max_rows = count($rows); foreach ($rows as $curr_row) { for ($i = 0; $i <= $max_rows; $i++) { $common = array_intersect($curr_row, $rows[$i]); foreach ($common as $key => $value) { echo "Key: $key; Value: $value\n"; } echo "<BR>" } } You will need to check and make sure $curr_row is not the same row as '$rows[$i]', otherwise you will always get a match (unless you want this of course). Rob. -----Original Message----- From: php-objects@xxxxxxxxxxxxxxx [mailto:php-objects@xxxxxxxxxxxxxxx] On Behalf Of Robert Barker Sent: 17 January 2008 14:57 To: php-objects@xxxxxxxxxxxxxxx Subject: HOW DO I CREATE A LOOP CRAWLER? Hello, I am very new to PHP and I am focusing on arrays to speed up my learning curse on the programme. The following is an array I am working with and I am stuck. Can anyone help please? <?php // The following is a table $row_1 = array(4,11,24,26,36,38,45,35,44,48); $row_2 = array(1,0,13,9,35,33,47,25,39,55); $row_3 = array(5,12,14,54,35,36,48,65,55,87); $row_4 = array(0,2,55,26,41,36,67,35,36,69); $row_5 = array(1,3,13,24,35,42,42,45,39,70); $row_6 = array(1,2,3,64,8,37,6,49,35,36,48); $row_7 = array(9,11,24,26,16,38,45,35,44,48); $row_8 = array(3,0,13,9,35,23,47,25,39,55); $row_9 = array(5,12,15,14,35,36,43,65,55,87); $row_10 = array(0,5,55,26,31,36,67,35,36,69); $row_11 = array(1,3,17,24,34,42,42,45,33,70); $row_12 = array(1,1,3,66,8,37,6,49,35,36,48); $row_13 = array(0,2,55,26,41,36,67,35,36,69); $row_14 = array(1,3,13,24,35,42,42,45,39,70); $row_15 = array(1,2,3,64,8,37,6,49,35,36,48); $row_16 = array(9,11,24,26,16,38,45,35,44,48); $row_17 = array(3,0,13,9,35,23,47,25,39,55); $row_18 = array(5,12,15,14,35,36,43,65,55,87); $row_19 = array(0,2,55,26,41,36,67,35,36,69); $row_10 = array(1,3,13,24,35,42,42,45,39,70); $row_21 = array(1,2,3,64,8,37,6,49,35,36,48); $row_22 = array(9,11,24,26,16,38,45,35,44,48); $row_23 = array(1,0,13,9,35,33,47,25,39,55); $row_24 = array(5,12,14,54,35,36,48,65,55,87); $row_25 = array(0,2,55,26,41,36,67,35,36,69); $row_26 = array(1,3,13,24,35,42,42,45,39,70); $row_27 = array(1,2,3,64,8,37,6,49,35,36,48); $row_28 = array(9,11,24,26,16,38,45,35,44,48); $row_29 = array(3,0,13,9,35,23,47,25,39,55); $row_30 = array(5,12,15,14,35,36,43,65,55,87); $row_31 = array(0,2,55,26,41,36,67,35,36,69) // Next is to find the common element(number) in each row $common = array_intersect($row_1, $row_2); foreach ($common as $key => $value) { echo "Key: $key; Value: $value\n"; } echo "<BR>" ?> My problem is the above works only on $row_1 and $row_2, and I am stuck. My question is two-fold. The first is, how do I write the LOOP to get $row_1 to go through and intersect with the rest of the rows in the table, that is, to intersect with $row_3, $row_4 etc and not just stop at $row_2? The second question is; if the LOOP goes through to the end, how do I get it to start at row $row_2 as the main interceptor to repeat the process, after that $row_3 and so on and so forth. __________________________________________________________ Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com Are you looking for a PHP job? Join the PHP Professionals directory Now! http://www.phpclasses.org/professionals/ Yahoo! Groups Links *********************************************************************************** Any opinions expressed in email are those of the individual and not necessarily those of the company. This email and any files transmitted with it are confidential and solely for the use of the intended recipient or entity to whom they are addressed. It may contain material protected by attorney-client privilege. If you are not the intended recipient, or a person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. Random House Group + 44 (0) 20 7840 8400 http://www.randomhouse.co.uk http://www.booksattransworld.co.uk http://www.kidsatrandomhouse.co.uk Generic email address - enquiries@xxxxxxxxxxxxxxxxx Name & Registered Office: THE RANDOM HOUSE GROUP LIMITED 20 VAUXHALL BRIDGE ROAD LONDON SW1V 2SA Random House Group Ltd is registered in the United Kingdom with company No. 00954009, VAT number 102838980 ***********************************************************************************