How To Compare Array Elements With Each Other In PHP

Posted By Bajarangi soft , Posted On 16-09-2020

compare array elements with each others using for loop or for each loop in php and you check each elements

let's learn

1.Create Array.

An array is a data structure that stores one or more similar type of values in a single variable.

$array=["Raspberries", "Strawberries", "Blueberries", "Gooseberries","Farkleberry"];

2.Creating loops to compare array all elements each others.
1.for loop.

After creating array elements
Count array elements using count function.
The for loop by $i variable that loop goes 0 to n-2.
Create inner for loop using $j variable the inner loop takes the value from the outer for loop value as initial and goes to the end.

$count = count($array);
for ($i = 0; $i < $count - 1; $i++) {//outerloop which goes 0 to n-2
    for ($j = $i + 1; $j < $count; $j++) {// inner loop initial the outerloop values and goes until end
        // compare $array[$i] with $array[$j]...
    }
}

2.foreach loop.

after creating array elements.
use array_values it will return all the values of an array
Create foreach loop by $x variable that loop through a block of code for each element in an array.
Create inner foreach loop that initial the value of outer foreach loop.

 foreach($x as $key1 => $item){
    foreach($x as $key2 => $item2){
               //compare 
     }
  }

Complete code for compare all array elements with each other.

<!DOCTYPE html>
<html>
<head>
    <title>Compare all array elements with each other in PHP</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
</head>
<body>
<div class="container">
    <div class="text-center">
        <h1>Compare all array elements with each other in PHP</h1>
    </div>
    <h3>Using for loop</h3>
    <div class="well">
        <?php
        $array_1=["Raspberries", "Strawberries", "Blueberries", "Gooseberries","Farkleberry"];
        $count = count($array_1);//count function to count array elements
        for ($i = 0; $i < $count - 1; $i++) {
            for ($j = $i + 1; $j < $count; $j++) {
                echo $array_1[$i] . "  vs  " . $array_1[$j] . "<br>";
            }
        }
        ?>
    </div>
    <h3>Using foreach loop</h3>
    <div class="well">
        <?php
        $array_2 = array('R' => "Raspberries", 'S' => "Strawberries", 'B' => "Blueberries", 'G' => "Gooseberries", 'F' => "Farkleberry");
//        $array_2=["Raspberries", "Strawberries", "Blueberries", "Gooseberries","Farkleberry"];// works also with this array
        $x = array_values($array_2);
        $y = array_keys($array_2); // Optional
        foreach($x as $key1 => $item){
            foreach($x as $key2 => $item2){
                if($key2 <= $key1){

                    continue;
                }
                if($item == $item2){

                    continue;
                }
//        echo $item . ' vs ' . $item2 . '<br>';
                echo $y[$key1] . ' vs ' . $y[$key2] . '<br>'; // Optional
            }
        }
        ?>
    </div>
    <br>
</div>
</body>
</html>

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