RE: [PHP] RE: Function to compare an array with another array

How about using the array_diff function instead. array_diff ($array1,$array2) = elements in $array1 not in $array2; array_diff ($array2,$array1) = elements in $array2 not in $array1; From manual: array array_diff (array array1, array array2 [, array ...]) Array_diff() returns an array containing all the values of array1 that are not present in any of the other arguments. Note that keys are preserved. Example 1. Array_diff() example $array1 = array ("a" => "green", "red", "blue"); $array2 = array ("b" => "green", "yellow", "red"); $result = array_diff ($array1, $array2); This makes $result have array ("blue"); -----Original Message----- From: Fang Li [mailto:fli@biographix.com] Sent: 15 March 2001 14:03 To: Tim Ward; 'Jimmy Bäckström'; PHP General List Subject: RE: [PHP] RE: Function to compare an array with another array Hi, I am trying to use the Function ArrayCompare, but it always has an error in "if(($key = array_search($element, $array2)) == false)", and also I couldn't get the page of http://www.stivesdirect.com/e-mail-disclaimer.html Would you please give me a clue? Thanks! Fang -----Original Message----- From: Tim Ward [mailto:tim.ward@stivesdirect.com] Sent: March 5, 2001 5:48 AM To: 'Jimmy Bäckström'; PHP General List Subject: [PHP] RE: Function to compare an array with another array function ArrayCompare($array1, $array2) { $answer = new Array() foreach ($array1 as $element) { if (($key = array_search($element, $array2)) === false) { $answer[$key] = $array2[$key]; } } return $answer; } this will return an array that is a copy of the first array with only those elements that are not in array2. If you only want the first one either just use the first one( foreach(){ ... break;}) or put a break in the if. Tim Ward Senior Systems Engineer Please refer to the following disclaimer in respect of this message: http://www.stivesdirect.com/e-mail-disclaimer.html > -----Original Message----- > From: Jimmy Bäckström [mailto:broder_b@chello.se] > Sent: 05 March 2001 06:38 > To: PHP General List > Subject: Function to compare an array with another array > > > Shu! > I need some help here. > I have a script where I want to compare two arrays with > eachother, and return one value from that does not exists in > both arrays. I have an array of pictures id number created > from a database query. I use sessions to save id numbers of > pictures into an array. I want the first array to be compared > to the second and return the first key/value-pair that are > not found in the session array... > Is there a way I can do this? > > Thankful for any help! > /Broder B > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net