From one string to two, with filter between string

Question

I have this string:

[{"position":"1d","number":10,"nb_plot1":12,"max_actions":3}
{"position":"2d","number":7,"nb_plot1":15,"max_actions":30}
{"position":"3d","number":100,"nb_plot1":2,"max_actions":5}]

and i need to obtain two different string with different format like this:

for numbers:

[10,7,100]

for positions:

['1d','2d','3d']

and cut unnecesarry strings.

I'm a noob sorry.

php.net/manual/en/function.json-decode.php you may find this helpful — Dave
– Dave, Commented Apr 25, 2012 at 19:51

Igor Besel · Accepted Answer · 2012-04-26 11:36:52Z

2

Decode the string in a array with json_decode.

Iterate over this array and build new arrays for numbers and position.

Encode the arrays.

In code:

$arr = json_decode($string);

$numbers = array();
$positions = array();

foreach($arr as $a) 
{
    $numbers[] = (int)$a->number;
    $positions[] = $a->position;
}

$number_string = json_encode($numbers);
$position_string = json_encode($positions);

edited Apr 26, 2012 at 11:36

answered Apr 25, 2012 at 19:57

Igor Besel

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4 Comments

user1147636 Over a year ago

@Gore if I put var_dump(json_decode($string, true)); see the array, but with your code I have a blank page

Igor Besel Over a year ago

Yes. I forgot that json_decode return a array of Objects. :/ @user1147636

user1147636 Over a year ago

@Gore . Ok now number print right, but position_string return Null

user1147636 Over a year ago

@Gore You lost "s" in $position ....but this code works correctly! Many thanks to all.please correct it for other users.

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