PHP Strings: Working with Text Data in PHP

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Modify Strings

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PHP has a set of built-in functions that you can use to modify strings.

strtolower() and strtoupper(): Converts a string to lowercase or uppercase.

Example

<!DOCTYPE html>

<html>

<body>

<?php

echo strtolower("Hello World!"); // Outputs: hello world!

echo strtoupper("Hello World!"); // Outputs: HELLO WORLD!

</body>

</html>

Try it yourself

str_replace(): Replaces all occurrences of a search string with a replacement string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$newString = str_replace("World", "PHP", "Hello World"); // Outputs: Hello PHP

echo $newString;

</body>

</html>

Try it yourself

strrev(): This function takes a string as input and returns it reversed.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$originalString = "Hello, World!";

$reversedString = strrev($originalString);

echo $reversedString; // Outputs: !dlroW ,olleH

</body>

</html>

Try it yourself

trim(): This function is used to remove whitespace and other predefined characters from the beginning and end of a string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$text = ",.;Hello, World!;,.";

$trimmedText = trim($text, ",.;");

echo $trimmedText; // Outputs: "Hello, World!"

</body>

</html>

Try it yourself

explode() : This function is used to split a string into an array based on a specified delimiter.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$string = "apple,banana,orange";

$array = explode(",", $string);

print_r($array);

// Outputs: Array ( [0] => apple [1] => banana [2] => orange )

</body>

</html>

Try it yourself

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