What is the difference between == and === in PHP? PHP में == और === में क्या अंतर है?

Short Answer

PHP supports several types of loops to execute a block of code repeatedly: for (when you know exactly how many times you want to loop), while (when you want to loop as long as a condition is true), and foreach (specifically designed to iterate over arrays and objects).

Detailed Explanation & Examples

1. The for Loop

Used when the number of iterations is known in advance.

for ($i = 1; $i <= 3; $i++) {
    echo "Iteration: $i\n";
}
// Output: Iteration 1, Iteration 2, Iteration 3

2. The while Loop

Executes a block of code as long as the specified condition is true. The condition is evaluated before the loop runs.

$count = 1;
while ($count <= 3) {
    echo "Count: $count\n";
    $count++;
}

3. The foreach Loop

The easiest way to iterate over arrays without needing to track an index variable.

$fruits = ["Apple", "Banana", "Cherry"];
foreach ($fruits as $fruit) {
    echo "Fruit: $fruit\n";
}

Common Mistakes

Forgetting to increment the counter in a while loop (e.g., omitting $count++) will result in an infinite loop, crashing the script or exhausting server memory.