Laravel Input::old is an array as a string

Question

In my form im outputting some json or a string of data that is an array from Input::old('tags') the problem I'm having is being able to test it and see if it is json and if it is do a foreach loop and put the tag attribute is an array then implode the array and output it in an input field.

[{"id":112,"tag":"corrupti","tagFriendly":"corrupti","created_at":"2015-07-20 00:05:28","updated_at":"2015-07-20 00:05:28","pivot":{"question_id":60,"tag_id":112,"created_at":"2015-07-20 00:05:28","updated_at":"2015-07-20 00:05:28"}},{"id":9,"tag":"placeat","tagFriendly":"placeat","created_at":"2015-07-20 00:05:23","updated_at":"2015-07-20 00:05:23","pivot":{"question_id":60,"tag_id":9,"created_at":"2015-07-20 00:05:28","updated_at":"2015-07-20 00:05:28"}}]

So my output should look like this

'corrupti, placeat, etc...'

Could someone help me get the desired result following the steps I just outlined

This code doesn't work but it's what I kinda need to happen. is_array is always false

<?php
    $tags = Input::old('tags');
    if(is_array($tags)) {
        foreach ($tags as $tag) {
            $tags[] = $tag->tag;
        }
        $tags = implode(', ', $tags);   
    }                       
?>

json_decode will return an object containing the array so how you have it now is_array should be returning false. — askilondz
– askilondz, Commented Jul 23, 2015 at 2:07
yes because it's not seeing an array. you need to extract the array from the object. try $obj = json_decode($tags); print_r($obj[0]); see what that shows. — askilondz
– askilondz, Commented Jul 23, 2015 at 2:10

GeorgeQ · Accepted Answer · 2015-07-23 04:17:31Z

3

Here you go.

$tags = json_decode(Input::old('tags'), true); // decode json input as an array

if (is_array($tags)) {
    foreach ($tags as $key=>$value) {
        $tags[$key] = $value['tag'];
    }
    $tags = implode(', ', $tags);
    echo $tags;
}

answered Jul 23, 2015 at 4:17

GeorgeQ

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Comments

rotvulpix · Accepted Answer · 2015-07-23 02:08:19Z

1

You can use array_map to extract the tag property from the object.

<?php
$jsonObject = json_decode(Input::old('tags'));
if(is_array($jsonObject)) {
    $onlyTags = array_map(function($item) { return $item->tag; },$jsonObject);
    print implode(",", $onlyTags);
}

answered Jul 23, 2015 at 2:08

rotvulpix

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2 Comments

ONYX Over a year ago

the part where it goes is_array($jsonObject) return false so the code doesn't get past the if statement

M0rtiis Over a year ago

show us the output of this thing: dd(Input::old('tags'));

askilondz · Accepted Answer · 2015-07-23 02:32:54Z

1

Try adding true to json_decode.

json_decode($tags, true);

According to the docs that should return an associative array. http://php.net/manual/en/function.json-decode.php

is_array might not work with associative arrays with a key/value pair. Try replacing is_array with this function:

function is_associate_array($array)
{
    return $array === array_values($array);
}

So:

if(is_associate_array(json_decode($tags, true))) {

}

edited Jul 23, 2015 at 2:32

answered Jul 23, 2015 at 2:12

askilondz

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3 Comments

ONYX Over a year ago

It still returns false when you test if it is an array

askilondz Over a year ago

don't believe is_array will work. please look at my edit.

M0rtiis Over a year ago

your function is_associate_array do the opposite thing. it should be named as is_not_associate_array. BTW is_array will work fine. the only reason why is_array(json_decode(Input::old('tags'), true)) not works is that Input::old('tags') - is not a json string

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