Скачать или смотреть 5 PHP Functions Every Beginner Should Know

In this video, we’ll introduce 5 essential PHP functions that every beginner should know. These functions cover a range of common tasks, from string manipulation to array operations and file handling. By mastering these functions, you’ll be well-equipped to handle most basic PHP tasks. Let’s dive into the details and see how you can use these functions in your projects!

Learn:

1. strlen() - Check String Length
Example:

$text = "Hello World";
echo strlen($text); // Output: 11

// Real use: Validate input length
$username = "adam";
if (strlen($username) 〈 5) {
echo "Username too short!";
}

2. explode() - Split Text into Array
Example:

$data = "apple,banana,orange";
$fruits = explode(",", $data);

print_r($fruits);
// Output: Array ( [0] =〉 apple [1] =〉 banana [2] =〉 orange )

// Real use: Process CSV data or tags
$tags = "php,web,development";
$tag_array = explode(",", $tags);
print_r($tag_array);

3. array_merge() - Combine Arrays
Example:

$array1 = ['red', 'green'];
$array2 = ['blue', 'yellow'];
$result = array_merge($array1, $array2);

print_r($result);
// Output: Array ( [0] =〉 red [1] =〉 green [2] =〉 blue [3] =〉 yellow )

// Real use: Combine settings or configs
$defaults = ['theme' =〉 'dark', 'language' =〉 'en'];
$user_prefs = ['language' =〉 'ar'];
$settings = array_merge($defaults, $user_prefs);

4. file_get_contents() - Read Files/URLs
Example:

// Read local file
$content = file_get_contents("data.txt");
echo $content;

// Read from URL (API call)
$weather = file_get_contents("https://wttr.in/?format=3 ");
echo $weather . "\n";

// Real use: Simple API requests or file reading
$quotes = file_get_contents("quotes.txt");
$lines = explode("\n", $quotes);

5. implode() - Join Array into String
Example:

$colors = ['red', 'green', 'blue'];
$result = implode(", ", $colors);

echo $result; // Output: red, green, blue

// Real use: Create CSV data or display lists
$user_ids = [101, 102, 103];
$sql = "SELECT * FROM users WHERE id IN (" . implode(",", $user_ids) . ")";
echo $sql;

BONUS: in_array() - Check if Value Exists
Example:

$allowed_types = ['jpg', 'png', 'gif'];
$file_type = 'pdf';

if (!in_array($file_type, $allowed_types)) {
echo "File type not allowed!";
}
// Output: File type not allowed!


Quick Practice:
Example:

// Test all functions
$text = "Welcome to PHP";
$data = "name:email:phone";
$array1 = [1, 2];
$array2 = [3, 4];

echo strlen($text) . "\n";
print_r(explode(":", $data));
print_r(array_merge($array1, $array2));

✅ Why These Functions Matter:
strlen(): Input validation
explode(): Data processing
array_merge(): Array manipulation
file_get_contents(): File/API handling
implode(): Data formatting
Master these 5 and you'll handle 80% of common PHP tasks! 🚀

✅ Pro Tips:
Practice Regularly: Use these functions in your projects to get comfortable with them.
Read Documentation: Always refer to the official PHP documentation for detailed information.
Combine Functions: Use these functions together to solve more complex problems.

GitLab Link: You can find the example files and practice scripts for this tutorial at this GitLab link: https://gitlab.com/hatem-badawi/linux....

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