HTML DOM Input Submit formTarget Property

PHP | json_decode() Function

Last Updated : 09 May, 2019

The json_decode() function is an inbuilt function in PHP which is used to decode a JSON string. It converts a JSON encoded string into a PHP variable.

Syntax:

json_decode( $json, $assoc = FALSE, $depth = 512, $options = 0 )

Parameters: This function accepts four parameters as mentioned above and described below:

json: It holds the JSON string which need to be decode. It only works with UTF-8 encoded strings.
assoc: It is a boolean variable. If it is true then objects returned will be converted into associative arrays.
depth: It states the recursion depth specified by user.
options: It includes bitmask of JSON_OBJECT_AS_ARRAY, JSON_BIGINT_AS_STRING,, JSON_THROW_ON_ERROR.

Return values: This function returns the encoded JSON value in appropriate PHP type. If the json cannot be decoded or if the encoded data is deeper than the recursion limit then it returns NULL.

Below examples illustrate the use of json_decode() function in PHP:
Example 1:

<?php 
  
// Declare a json string 
$json = '{"g":7, "e":5, "e":5, "k":11, "s":19}'; 
  
// Use json_decode() function to 
// decode a string 
var_dump(json_decode($json)); 
  
var_dump(json_decode($json, true)); 
  
?> 

Output:

object(stdClass)#1 (4) {
  ["g"]=>
  int(7)
  ["e"]=>
  int(5)
  ["k"]=>
  int(11)
  ["s"]=>
  int(19)
}
array(4) {
  ["g"]=>
  int(7)
  ["e"]=>
  int(5)
  ["k"]=>
  int(11)
  ["s"]=>
  int(19)
}

Example 2:

<?php 
  
// Declare a json string 
$json = '{"geeks": 7551119}'; 
  
// Use json_decode() function to 
// decode a string 
$obj = json_decode($json); 
  
// Display the value of json object 
print $obj->{'geeks'}; 
  
?> 

Output:

Common Errors while using json_decode() function:

Used strings are valid JavaScript but not valid JSON.
Name and value must be enclosed in double quotes, single quotes are not allowed.
Trailing commas are not allowed.

Reference: http://php.net/manual/en/function.json-decode.php

HTML DOM Input Submit formTarget Property

C

Code_Mech

Improve

Article Tags :

Similar Reads

PHP | json_encode() Function

The json_encode() function is an inbuilt function in PHP which is used to convert PHP array or object into JSON representation. Syntax : string json_encode( $value, $option, $depth ) Parameters: $value: It is a mandatory parameter which defines the value to be encoded. $option: It is optional parame

PHP | utf8_decode() Function

The utf8_decode() function is an inbuilt function in PHP which is used to decode a UTF-8 string to the ISO-8859-1. This function decodes back to the encoded string which is encoded with the utf8_encode() function. Syntax: string utf8_decode( string $string ) Parameter: This function accepts single p

PHP decoct( ) Function

In the earlier days of computing, octal numbers and the octal numbering system was very popular for counting inputs and outputs because as it works in counts of eight, inputs and outputs were in counts of eight, a byte at a time. Due to a wide usage of octal number system many times it happens that

PHP explode() Function

The explode() function is an inbuilt function in PHP used to split a string into different strings. The explode() function splits a string based on a string delimiter, i.e. this function returns an array containing the strings formed by splitting the original string. Syntax:array explode(separator,

PHP | base64_decode() Function

The base64_decode() is an inbuilt function in PHP which is used to Decodes data which is encoded in MIME base64.Syntax: string base64_decode( $data, $strict ) Parameters: This function accepts two parameter as mentioned above and described below: $data: It is mandatory parameter which contains the e

PHP cos( ) Function

Trigonometry is an important part of mathematics and PHPâ€™s math functions provides us with some functions which are very useful for calculations involving trigonometry. The cos()function in PHP is used to find the cosine of a number. The cos() function returns a float value between -1 and 1, which r

PHP define() Function

The define() function is basically used by programmers to create constant. Constants in PHP are very similar to variables and the only difference between both are the values of constants can not be changed once it is set in a program. define() returns a Boolean value. It will return TRUE on success

PHP bindec( ) Function

While working with numbers, many times we need to convert the bases of number and one of the most frequent used conversion is binary to decimal conversion. PHP provides us with a built-in function bindec() for this purpose. The bindec() function in PHP is used to return the decimal equivalent of the

How to JSON Decode in PHP?

JSON Decode is the process of converting a JSON string into a PHP variable, typically an object or an associative array. Then we will print that decode JSON text. Below are the approaches to JSON decoding in PHP: Table of Content Using json_decode() methodUsing Explode and Foreach LoopUsing json_dec

PHP each() Function

The each() function is an inbuilt function in PHP and is used to get the current element key-value pair of the given array to which the internal pointer is currently pointing. After returning the key and value of the current element the internal pointer is incremented by one in the array. Note: You