CODEWITHSUNDEEP
phpjson
cj333
cj333

Reputation: 2609

how to make php json decode pagination

I am looking for a php json pagination method/class. Here is my code. How to make each 2 json data as a group, for a pagination?

$body = file_get_contents("out_file.txt");
$json = json_decode($body,true);
foreach($json as $data){
    echo $data['name'].' '; 
}

out_file.txt

[
    {"name":"text1","num":"1"},
    {"name":"text2","num":"2"},
    {"name":"text3","num":"3"},
    {"name":"text4","num":"4"},
    {"name":"text5","num":"5"},
    {"name":"text6","num":"6"}
]

I need divide data like this:

page1

text1 text2

page2

text3 text4

page3

text5 text6

Upvotes: 0

Views: 4557

Answers (2)

GordyD
GordyD

Reputation: 5103

json_decode($body,true) returns an array of associative arrays in place of the JSON objects specified in your file. Knowing that you have an array containing all the elements you want to cycle through you can use a generic pagination function to control which data is displayed. Something like...

$body = file_get_contents("out_file.txt");
$json = json_decode($body,true);
paginate($json,$pageNumber);

function paginate($data, $page = 1, $perPage = 2) {
   $x = ($page - 1) * $perPage;
   $z = $page * $perPage;
   $y = ($z > count($data)) ? count($data) : $z;
   for(; $x < $y; $x++) {
      echo $data[$x]['name'];
   }
}

Upvotes: 5

Marc B
Marc B

Reputation: 360732

JSON data is not a "display" medium... it's a data transfer format. How you do pageination of the data within the JSON body is up to you, but that's true of ANY data structure, not just JSON. Given that your sample JSON structure is an array, you'd simply do some array indexing with your "page" offsets:

$page = 2;
$items_per_page = 2;

echo $json[$page * $items_per_page]['name'] // $json[4] -> text5
echo $json[$page * $items_per_page + 1]['name'] // $json[5] -> text6

Upvotes: 1

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