How to unset value from json encode array using php-CodePudding

How can i delete value from json encode array using php. here is my json format.

{"1":["fileid",time],"2":["fileid",time],"3":["fileid",time]}

And here is my php code. but nothing is delete. i want to remove whole array value ex

"3":["fileid",time]

when function execute.

<?php
$filename = "test.json";
$fopen = fopen($filename,"r");
$fgets = fgets($fopen);
fclose($fopen);
$decode = json_decode($fgets,true);
foreach($decode as $post){
    $dif = time() - $post[1];
    if($dif > 5){
        foreach ((array)$post[0] as $val => $v) {
            echo  $id = $v.'<br>';
        }
        unset($decode[1]);   
    }
?>

Thanks

CodePudding user response：

You need an index, rather than always unsetting occurance 1. So change your foreach as below and use that index $i on the original array

You can also simplify the file read to file_get_contents()


$buf = file_get_contents("test.json");
$array = json_decode($buf,true);

foreach($array as $i => $post){
    $dif = time() - $post[1];
    if($dif > 5){
        unset($array[$i]);  
    }
}
file_put_contents("test2.json",json_encode($array));