Tag: foreach

PHP in_array(): Check if Array Contains Value (5 Code Examples)

How to Use PHP in_array function to check if the array contains a value Arrays are an important data structure in PHP, allowing developers to store and manipulate a collection of values. Often, developers need to check if an array contains a specific value. One way to accomplish this in PHP is using the in_array() function. This function returns a boolean value indicating whether a specified value exists in an array.  This article will discuss the syntax and usage of the in_array() function with examples. PHP in_array Code Example <?php /* Recursive approach */ $students = array( array("name" => "John", "age" => 20, "courses" => array("Math", "Science")), array("name" => "Mary", "age" => 22, "courses" => array("History", "English")), array("name" => "Peter", "age" => 24, "courses" => array("Computer Science", "Physics")) ); function searchArray($needle, $haystack) { foreach($haystack as $value) { //If array within array if(is_array($value)) { //Recursively call the function on the array.…

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Store foreach Loop Value in Array: 4 PHP Code Examples (2023)

How to Store Loop Values in a PHP Array There are 3 steps to storing loop values in PHP arrays. You need to instantiate a PHP variable with an empty array. Then, you will run your requirements with a loop like foreach. Finally, you can check for any needed conditions and add a value to the newly instantiated array. Check out the remaining article for examples. Are you needing to store values from a loop in a new array? This article will break down some common scenarios that I have experienced throughout my programming career. Storing Foreach Loop Values In Array PHP Code Example <?php // Define an indexed array $numbers = [5, 4, 2, 6, 10]; // Define an empty array to store the resulting values $results = []; // Loop through the array using foreach loop // store any 2, 6, 10 values in the new array to…

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Read JSON Files with PHP: 5 Code Examples (best in 2023)

JSON data can be accessed and utilized with many programming languages. In this article, we will learn how to read a JSON file in PHP. We will discuss all the methods used to read a JSON file, convert JSON objects into an array, and display it in PHP. Let’s first learn about what JSON is.  Read a JSON file with a PHP code example <?php // Reads the JSON file. $json = file_get_contents('./test_data.json'); // Decodes the JSON file. $json_data = json_decode($json,true); // Display the JSON data. print_r($json_data); ?> Table of Contents What is JSON? Encode JSON Data in PHP. Decode JSON Data in PHP. Read a JSON File using the file_get_contents() Function in PHP. Read JSON Files with PHP Code Examples Explored. What is JSON? JSON stands for JavaScript object notation. The JSON data is written as name/value pairs, and it is basically a lightweight data-interchange format that is very…

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PHP array_filter: 15 Array Filter Code Examples + Load Tests

How to use the PHP array_filter function to filter PHP Arrays Code Example <?php $dogBreedsILove = ["chihuaha", "collie", "golden retriever", "terrier"]; // I need all of the retreivers in the list. $retrievers = array_filter($dogBreedsILove, function ($breed) { return stripos($breed, "retriever"); } print_r($dagBreedsILove); PHP Array Filter Learning Path This article is part of our large series on filtering arrays. Feel free to browse through the articles we have listed below and dig further into some unique scenarios. These articles will help you level up your PHP development skills How to filter PHP associative array How to use Doctrine ArrayCollection map and filter functions Array of objects in PHP | How to create, sort, filter, merge & search them Filter an array of objects by values in PHP How to filter arrays of objects by keys in PHP Filter multidimensional array by value in PHP PHP Arrays Array Filter Load Testing: array_filter…

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15+ Array of Objects PHP Code Examples | Easy 2023 Tutorial

How to work with an array of objects in PHP code Can you have arrays of objects in PHP Yes, you can definitely create, store, filter, merge and work with an array of objects in PHP. You can decode JSON objects as arrays as well as create array collections of PHP arrays. PHP offers many solutions to work with an array of objects. This article will break down 2 common scenarios when working with arrays of objects in PHP. Visitors come to us many times to ask questions about working with PHP classes and objects as well as JSON objects. Both situations are common but do have unique requirements. Let's first get into PHP classes and objects. Then we will follow it up with Working with PHP Classes and Objects PHP was originally designed as a purely procedural language. Starting in PHP 4 and greatly extending into PHP 5, it…

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How to Store a PHP Array in MySQL

Store Array in MySQL PHP
Save a PHP array in mySQL column This article explores how to save PHP arrays in MySQL. MySQL is an open-source relational database management system that allows you to store data in rows and columns. SQL stands for Structured Query Language for manipulating and retrieving data from SQL databases. Know more about MySQL. Before You Read! The article requires you to connect to your MySQL database with PHP, create a table and connect to it in PHP. If you’re not familiar with all these consider learning it from w3schools. Here we just focus on different ways of storing arrays in MySQL PHP. Storing Arrays in a Normalized Table Employees Table You need to create an employee table at your end if you’re trying out the examples in the article. For your convenience, here’s the SQL table creation code for you. CREATE TABLE EMPLOYEES_TABLE ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,…

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How to fix array to string conversion in PHP

array to string conversion in php
Array to string conversion in PHP Array to string conversion in PHP warning occurs when PHP tries to implicitly convert array to string. One of the recommended fixes is as follows. <?php $array = [ "a" => ["b" => ["c" => "d"]], "e" => "f", "g" => ["h", "i"=>["j","k"]] ]; echo 'The array is: '.json_encode($array); //The array is: {"a":{"b":{"c":"d"}},"e":"f","g":{"0":"h","i":["j","k"]}} ?> There are other fixes too. Stay tuned to the article to learn more. Introduction PHP implicitly converts primitive types like integer, string, and boolean to other types based on the context. For instance, the following example demonstrates implicit conversion. Learn more about type conversions. <?php $integer = 101; $boolean = true; $string = '2'; echo 'Hello to PHP '.$integer.'!!'; //Hello to PHP 101!! echo 2 + $boolean; //3 echo 3 * $string; //6 ?> See how PHP infers the type from the context. It converts boolean (true) to 1 and…

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How to update specific key in multidimensional array in PHP

update specific key in multidimensional array in PHP
Update specific key in multidimensional array in PHP This article demonstrates how to recursively update specific key in multidimensional array in PHP.  Introduction Multidimensional arrays add alot to the complexity than a linear array. Similarly, updating specific keys in a multidimensional array using an iterative approach is complex and unpredictable.  So, in this article, we take up the challenge and explore how to update specific key in multidimensional array in PHP.  How to update key value in array PHP? The article “How to update key value in array PHP” explores three options for changing keys in a linear array.  A loop approach.The direct indexing approach.Using PHP array_search function. Out of these three, direct indexing stands out in terms of efficiency. That said, this article will use a mix of these to develop a generic function to handle multidimensional arrays. How to update specific key in multidimensional array in PHP Before…

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How do you push multiple items to array PHP

push multiple items to array PHP
Push multiple items to array PHP PHP arrays are dynamic, thus extendable at run time. It means that you can push multiple items to array PHP, and it won’t bother you with exceptions like a static array would in Java or C++. PHP array_push function is super helpful in pushing into an array though iteration also works. This article includes examples of pushing multiple items to an array. The first example uses a loop, followed by other examples of using array_push and array_merge. So, let’s just get to the examples now. Push multiple items to array PHP with loop We have an array of numbers from six to ten, and we need to push these to an array that already has numbers from one to five. The following example adds items iteratively to an array in PHP. <?php $numbers = [1, 2, 3, 4, 5]; $some_more_numbers = [6, 7, 8,…

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How to update key value in an associative array PHP

How to update key value in array PHP
Update key value in array PHP This article focuses on how to update key value in array PHP. Though the article includes three approaches, the second approach is the most efficient. Introduction PHP associative arrays are basically hash maps as they include key and value pairs. The keys are unique but mutable. Thus, we can update key value in array PHP, and that’s exactly what this article will focus on. Let’s begin. #1 - Update key value in array PHP using a loop The most obvious approach is using a loop. PHP foreach loop is convenient because it gives us easy access to key and value pairs. The following example will use a foreach loop to change key value in array PHP. <?php $students_score = [ "Alison" => 10, "Liam" => 9, "Jenny" => 8, "Jamie" => 7, "Ron" => 6 ]; function changeName($students_score, $oldName, $newName) { foreach($students_score as $student=>$score)…

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