PHP Strings: Working with Text Data in PHP

Strings are sequences of characters used to store and manipulate text. PHP provides a variety of functions for working with strings, making it easy to create, modify, and manipulate text content.

1. Creating Strings

Single Quoted Strings: The simplest way to create a string. It does not interpret variables or special characters (except for \\ and \').

Example

<!DOCTYPE html>

<html>

<body>

<?php

echo 'This is a simple string \n john.';

</body>

</html>

Try it yourself

Double Quoted Strings: More flexible. They parse variables and escape sequences like \n (newline).

Example

<!DOCTYPE html>

<html>

<body>

<?php

$name = "John";

$string = "Hello, $name";

$newline = "Line 1\nLine 2";

$str = 'This is a \'simple\' string';

echo $string."<br>";

echo $newline."<br>";

echo $str;

</body>

</html>

Try it yourself

Common String Functions

strlen(): Returns the length of a string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

echo strlen("Hello World!"); // Outputs: 12

</body>

</html>

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str_word_count(): Returns counts the number of words in a string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

echo str_word_count("Hello world!");

</body>

</html>

Try it yourself

strpos(): Finds the position of the first occurrence of a substring in a string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$position = strpos("Hello World", "World"); // Outputs: 6

echo $position;

</body>

</html>

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substr(): Returns a portion of a string.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$substring = substr("Hello World", 0, 5); // Outputs: Hello

echo $substring;

</body>

</html>

Try it yourself

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