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Loops (for, while, foreach)

 Loops in PHP are used to execute a block of code repeatedly until a specified condition is met. They are essential for tasks like iterating through arrays, processing data, and automating repetitive actions.

For Loop

The for loop executes a block of code a specific number of times. It is commonly used when you know in advance how many times the loop should run.

Example:

<?php

for ($i = 1; $i <= 5; $i++) {

    echo "Number: $i\n";

}

?>

Output:

Number: 1

Number: 2

Number: 3

Number: 4

Number: 5

While Loop

The while loop executes a block of code as long as a specified condition is true. It is useful when the number of iterations is not known beforehand.

Example:

<?php

$i = 1;

 

while ($i <= 5) {

    echo "Number: $i\n";

    $i++;

}

?>

Output:

Number: 1

Number: 2

Number: 3

Number: 4

Number: 5

Do-While Loop

The do-while loop is similar to while, but it guarantees that the code block is executed at least once, even if the condition is false.

Example:

<?php

$i = 6;

 

do {

    echo "Number: $i\n";

    $i++;

} while ($i <= 5);

?>

Output:

Number: 6

Foreach Loop

The foreach loop is specifically used to iterate over arrays. It provides an easy way to access each element without using a counter.

Example:

<?php

$colors = ["Red", "Green", "Blue"];

 

foreach ($colors as $color) {

    echo "Color: $color\n";

}

?>

Output:

Color: Red

Color: Green

Color: Blue

Conclusion

Loops in PHP allow you to automate repetitive tasks efficiently. Using for, while, do-while, and foreach loops, you can handle arrays, counters, and dynamic conditions to build flexible and scalable web applications.

 

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