PHP Loops

In PHP, loops are used to execute a block of code repeatedly as long as a specified condition is true. They provide a way to iterate over arrays, manipulate data, and perform repetitive tasks efficiently. Here’s an overview of PHP loops along with examples:

In PHP, loops are used to execute a block of code repeatedly as long as a specified condition is true. They provide a way to iterate over arrays, manipulate data, and perform repetitive tasks efficiently. Here’s an overview of PHP loops along with examples:

1. while Loop:

The while loop executes a block of code as long as the specified condition is true.

Syntax:

while (condition) { // code to be executed }

Example:

$i = 1; while ($i <= 5) { echo "The number is: $i <br>"; $i++; }

2. do-while Loop:

The do-while loop is similar to the while loop, but it executes the block of code at least once before checking the condition.

Syntax:

do { // code to be executed } while (condition);

Example:

• $i = 1;
do {
 echo "The number is: $i <br>";
 $i++;
} while ($i <= 5);

3. for Loop:

The for loop is used when you know in advance how many times the code should be executed.

Syntax:

for (initialization; condition; increment/decrement) { // code to be executed }

Example:

• for ($i = 1; $i <= 5; $i++) {
 echo "The number is: $i <br>";
}

4. foreach Loop:

The foreach loop is used to iterate over arrays.

Syntax:

foreach ($array as $value) { // code to be executed }

Example:

• $colors = array("Red", "Green", "Blue");
foreach ($colors as $color) {
 echo "The color is: $color <br>";
}

Loop Control Statements:

PHP also provides loop control statements to alter the flow of loops.

• break: Terminates the loop immediately.
• continue: Skips the current iteration and continues with the next iteration.
• exit: Terminates the script execution entirely.

Example of Loop Control Statements:

for ($i = 1; $i <= 10; $i++) {
 if ($i == 5) {
  break; // Terminate the loop if $i equals 5
 }
 if ($i % 2 == 0) {
  continue; // Skip even numbers
 }
 echo $i . "<br>";
}

PHP loops provide a powerful way to iterate over data and perform repetitive tasks efficiently. They are essential for building dynamic and responsive applications, especially when working with arrays or processing large sets of data.