PHP Tutorial

🧵 PHP Strings and Numbers

In PHP, strings and numbers are two of the most commonly used data types. Let’s explore how to work with both effectively.

📘 PHP Strings

A string is a series of characters, like "Hello World!" or "Technorank".

Examples of strings:

<?php
  $text1 = "Hello World!";
  $text2 = 'Technorank Solutions';
  echo $text1;
?>
  

✨ String Functions

• strlen() – Returns the length of a string
• strtoupper() – Converts to uppercase
• strtolower() – Converts to lowercase
• str_replace() – Replaces text within a string
• strpos() – Finds the position of text in a string

$text = "Technorank is cool!";
echo strlen($text);       // Output: 20
echo strtoupper($text);   // Output: TECHNORANK IS COOL!
  

🔢 PHP Numbers

PHP supports integers (whole numbers) and floats (decimal numbers).

Examples of numbers:

<?php
  $x = 10;      // Integer
  $y = 5.5;     // Float
  echo $x + $y; // Output: 15.5
?>
  

📏 Number Functions

• is_int() – Checks if value is an integer
• is_float() – Checks if value is a float
• round() – Rounds a number
• number_format() – Formats a number with grouped thousands

$num = 1234.567;
echo round($num);              // Output: 1235
echo number_format($num, 2);   // Output: 1,234.57