PHP按特定键排序数组[重复]

Question

This question already has an answer here:

• How can I sort arrays and data in PHP? 10 answers

I have an array that looks like this:

"lines":[
 {"value":1,"id":0},
 {"value":10,"id":1}
]

My goal is to always get the one with value: 10 as first so I want to sort it with ksort maybe but I am not sure

This is my goal:

"lines":[
 {"value":10,"id":1},
 {"value":1,"id":0}
]

Anyone who can help many thanks!

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Answer 1

@Frank Lucas If you want to order a multidimensional array by any key so you can you usort() function

If you want to sort you array by "value" index in descending order so try the below code and understand it

<?php
    $lines = array(array("value"=>1,"id"=>0), array("value"=>10,"id"=>1));
    function order($a, $b){
        if ($a["value"] == $b["value"]) {  //here pass your index name
            return 0;
        }
        return ($a["value"] > $b["value"]) ? -1 : 1;    // this your key "value" will be in descending order as  requirement
        //but if you want to change this order from descending to Ascending order so just change the -1 and 1 place in above condition 
    }
    usort($lines,"order");
    print_r($lines);
?>

It will solve your problem (y)