json_encode function will returns a string containing the JSON representation of a value.it supports only UTF-8 encoded See the Example here
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<?php $arr = array('v1' => 1, 'v2' => 2, 'v3' => 3, 'v4' => 4, 'v5' => 5); echo json_encode($arr); ?> |
Output: ——- {“v1″:1,”v2″:2,”v3″:3,”v4″:4,”v5”:5}
json_decode function takes json encoded straing and converted to php variable. this function works only for UTF-8 encoded string. for Example check the below code
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<?php $json = '{"v1":1,"v2":2,"v3":3,"v4":4,"v5":5}'; var_dump(json_decode($json)); var_dump(json_decode($json, true)); ?> |
object(stdClass)#1 (5) { [“v1”]=> int(1) [“v2”]=> int(2) [“v3”]=> int(3) [“v4”]=> int(4) [“v5”]=> int(5) } array(5) { [“v1”]=> int(1) [“v2”]=> int(2) [“v3”]=> int(3) [“v4”]=> int(4) [“v5”]=> int(5) }
json_decode— Decodes a JSON string json_encode— Returns the JSON representation of a value json_last_error_msg– Returns the error string of last json_encode or json_decode call json_last_erro- Returns the last error occured