How can the PHP version on a server affect the functionality of a script, and what steps should be taken to ensure compatibility with newer PHP versions?

The PHP version on a server can affect the functionality of a script if the script uses deprecated features or functions that are no longer supported in newer PHP versions. To ensure compatibility with newer PHP versions, it is important to update the script to use modern PHP syntax and functions. 

// Example of updating a script to ensure compatibility with newer PHP versions
// Before updating
$old_array = array("apple", "banana", "cherry");
foreach($old_array as $fruit) {
    echo $fruit;
}

// After updating
$new_array = ["apple", "banana", "cherry"];
foreach($new_array as $fruit) {
    echo $fruit;
}

Keywords

PHP version script functionality compatibility migration deprecated features

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