![]() ![]() Our first example is to find all people who owns a 'Tesla' from our sample JSON. Now we learn how to search a nested JSON for a specific value. So far, we have seen how to access all objects at a particular level. Here is another example to print the number of cars each person has.Įcho( $elem.": ".count($elem)) To print all the names and corresponding cars. ![]() If you have an array inside a nested JSON object then use two foreach loops to access the inner array element. To print all the names and corresponding favourite colour.Įcho( $elem." - ".$elem ) You can access this inner JSON object just as you access a multidimensional associative array. For each person, there is a key named favourite whose value is another JSON object. In our example JSON, there are three JSON objects each corresponding to the details about a person. The value of a JSON can be another JSON object. For example, to print all the name and id numbers from our example JSON document:Īccessing Nested objects inside a JSON array To access the objects inside a JSON array, the simplest and easiest method is to use a foreach loop to iterate through the array elements and fetch the data that you need. Note that the second argument in the json_decode function is set to true so that the objects returned will be associative arrays.įor more details on parsing JSON in PHP, read How to parse JSON in PHP Accessing objects inside a JSON array $json_string = file_get_contents($filepath) Firstly read the contents of the text file into a string variable using the file_get_contents() function and then use json_decode() function to convert the JSON string to a PHP variable. Syntax of PHP foreach (): The foreach () method has two syntaxes, one for each type of array. This allows you to run blocks of code for each element. It can also be used to iterate over objects. "favourite": Ĭonsider that our example JSON is stored in a file named "persons.txt". The foreach () method is used to loop through the elements in an indexed or associative array. The first three are general-purpose loop constructs, and foreach is used exclusively with arrays. if (year40 year1000 & not) (year + ' is a leap year') else (year + ' is not a leap year') How would the for loop look like if I convert it into a for loop Would the if else statement be inside of the for loop or just taken away from the code java. There are four loop statements in PHP: while, dowhile, for, and foreach. Let's look at some examples for accessing data a nested JSON document like below. Loops add control to scripts so that statements can be repeatedly executed as long as a conditional expression remains true. One method is to use recursion just like you access data from a nested array or tree data structure. JSON objects are key-value pairs and there are different methods you can use to access JSON objects from a nested JSON document. Therefore, with each iteration, variable will move to next index position.A JSON document can have JSON objects nested inside other JSON objects. Since, while loop will not increment our index variable automatically, we need to increment it inside the loop. ![]() The condition will be to continue fetching element from an array til our index values is less than the count of array (or length of the given array). ![]() Here, we will create an index position variable and start with 0th position which is first in an array. So, we can use the while loop to change the index position incrementally or decrementally therefore accessing every element (or selective elements as per the condition). The PHP arrays have elements which can be accessed via its index position, right? How to Iterate over PHP array using while loop Keep doing it, until expression becomes false. It means that, while the given expression (or condition) is true, execute the code inside the curly brackets, and check the expression again. ![]()
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