array_combine(): keys of one array and values of another

$input1=array('One','Two','Three','Four','Five');
$input2=array(1,2,3,4,5);
$output=array_combine($input1,$input2);
print_r($output);

Array ( [One] => 1 [Two] => 2 [Three] => 3 [Four] => 4 [Five] => 5 )

array_combine ($input_array1 ,$input_array2 )

Example 1: Handling Mismatched Array Lengths

<?php
$keys = ['name', 'email'];
$values = ['John Doe', 'john@example.com', 25]; // Extra value

// This will trigger a warning because the arrays are not of equal length
$result = @array_combine($keys, $values);
if ($result === false) {
    echo "Error: Arrays must have the same length!";
} else {
    print_r($result);
}
?>

Error: Arrays must have the same length!

Example 2: Real-World Use Case - Combining Form Labels and User Input

<?php
$labels = ['Name', 'Email', 'Age'];
$userInput = ['Alice', 'alice@example.com', 28];

// Combining form labels with user input
$formData = array_combine($labels, $userInput);

print_r($formData);
?>

Array
(
    [Name] => Alice
    [Email] => alice@example.com
    [Age] => 28
)

Example 3: Handling NULL values in Combined Arrays

<?php
$keys = ['Name', 'Email'];
$values = ['Bob', null]; // Null value in the array

$combined = array_combine($keys, $values);

// Check for null values
foreach ($combined as $key => $value) {
    if (is_null($value)) {
        echo "$key has no value set.<br>";
    } else {
        echo "$key: $value<br>";
    }
}
?>

Name: Bob
Email has no value set.