ABeginner’sGuideto10Must-KnowPHPFunctions
PHP is a popular server-side scripting language that is used to develop web applications and dynamic websites. It has a wide range of built-in functions that make coding easier and faster. In this beginner’s guide, we will explore 10 must-know PHP functions that every developer should be familiar with.
1. echo()
The echo() function is commonly used to output text and variables in PHP. It simply displays the output on the screen.
Example:
$name = "John Doe";
echo "Hello, " . $name . "!";
Output:
Hello, John Doe!
2. strlen()
The strlen() function returns the length of a string.
Example:
$text = "This is a sample text.";
echo strlen($text);
Output:
22
3. strpos()
The strpos() function returns the position of the first occurrence of a substring within a string.
Example:
$text = "This is a sample text.";
echo strpos($text, "sample");
Output:
10
4. str_replace()
The str_replace() function replaces all occurrences of a substring within a string with another string.
Example:
$text = "This is a sample text.";
echo str_replace("sample", "example", $text);
Output:
This is a example text.
5. strtolower()
The strtolower() function converts all uppercase characters in a string to lowercase.
Example:
$text = "THIS IS A SAMPLE TEXT.";
echo strtolower($text);
Output:
this is a sample text.
6. strtoupper()
The strtoupper() function converts all lowercase characters in a string to uppercase.
Example:
$text = "this is a sample text.";
echo strtoupper($text);
Output:
THIS IS A SAMPLE TEXT.
7. round()
The round() function rounds a floating-point number to the nearest integer.
Example:
$num = 3.1416;
echo round($num);
Output:
3
8. date()
The date() function returns the current date and time.
Example:
echo date("l jS \of F Y h:i:s A");
Output:
Sunday 12th of September 2021 10:00:00 AM
9. rand()
The rand() function generates a random number within a specified range.
Example:
echo rand(1, 100);
Output:
34
10. explode()
The explode() function splits a string into an array by a specified delimiter.
Example:
$text = "this-is-a-sample-text";
$arr = explode("-", $text);
print_r($arr);
Output:
Array
(
[0] => this
[1] => is
[2] => a
[3] => sample
[4] => text
)
These 10 must-know PHP functions are just a few examples of the wide range of built-in functions available in PHP. By mastering these functions, you will be able to write efficient and effective PHP code for your web applications and dynamic websites.