Practical - 5 IWD

 

Aim 1(a): Check if the given string is in lowercase

Program

<?php
$string = "hello world";

if ($string === strtolower($string)) {
    echo "The given string is in lowercase.";
} else {
    echo "The given string is NOT in lowercase.";
}
?>

• strtolower() converts a string to lowercase.

• If the original string and lowercase string are the same, it means the string is already in lowercase.

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Aim 1(b): Replace a given word from the given string

Program

<?php
$string = "PHP is a powerful scripting language";
$search = "powerful";
$replace = "popular";

$newString = str_replace($search, $replace, $string);

echo "Original String: " . $string . "<br>";
echo "Modified String: " . $newString;
?>

• str_replace() replaces a word or part of a string with another word.

• The function does not change the original string; it returns a new one.