Sort multidimentional array by an array value

[spikeZ]

Hi folks
Proper brain fart moment here....

Say I have a multidimentional array such as:

$d = array(
    "set1"=>array(
        "name"=>"Product 1",
        "price"=>"22.00"),
    "set2"=>array(
        "name"=>"Product 2",
        "price"=>"12.00"),
    "set3"=>array(
        "name"=>"Product 3",
        "price"=>"244.00")
    ); 

I need to sort it by price....

help!

[printf]

uasort();

<?php

$d = array(

    "set1"=>array(

        "name"=>"Product 1",

        "price"=>"22.00"),

    "set2"=>array(

        "name"=>"Product 2",

        "price"=>"12.00"),

    "set3"=>array(

        "name"=>"Product 3",

        "price"=>"244.00")

    );

// sort low to high

uasort ( $d, create_function ( '$a,$b', 'return ( $a["price"] == $b["price"] ? 0 : ( $a["price"] < $b["price"] ? -1 : 1 ) );' ) );

print_r ( $d );

// sort high to low

uasort ( $d, create_function ( '$a,$b', 'return ( $a["price"] == $b["price"] ? 0 : ( $a["price"] > $b["price"] ? -1 : 1 ) );' ) );

print_r ( $d );

?>

[spikeZ]

nice
Thanks

[Cups]

Here's another way, not saying its better, its just that I am swotting up on this in any case ...

$d = array(
    "set1"=>array(
        "name"=>"Product 1",
        "price"=>"22.00"),
    "set2"=>array(
        "name"=>"Product 2",
        "price"=>"12.00"),
    "set3"=>array(
        "name"=>"Product 3",
        "price"=>"244.00")
    ); 

//reassign the values if "set1" is meaningless

foreach ( $d as $k=>$v ){
// offers the possibilty to make sure price is a FLOAT too
$product[ $v['price'] ] = $v['name'];  
}

ksort($product) ;

// print_r($product) ;
// gives
// Array ( [12.00] => Product 2 [22.00] => Product 1 [244.00] => Product 3 ) 

[spikeZ]

also nice cups buuuuuuut forgot to mention that there are 6 other value in the array besides name and price

[Cups]

typical, do you expect me to read between the lines? (tehe...)

[stereofrog]

uasort ( $d, create_function ( '$a,$b', 'return ( $a["price"] == $b["price"] ? 0 : ( $a["price"] < $b["price"] ? -1 : 1 ) );' ) ); 

This can be expressed much simpler using subtraction:

uasort($d, create_function('$a,$b', 
    'return $a["price"] - $b["price"];'));