Looping



PHP Looping: Loops execute a block of code a specified number of times, or while a specified condition is true. In PHP, we have the following looping statements:

  • while - loops through a block of code while a specified condition is true
  • do...while - loops through a block of code once, and then repeats the loop as long as a specified condition is true
  • for - loops through a block of code a specified number of times
  • foreach - loops through a block of code for each element in an array

The while Loop: The while loop executes a block of code while a condition is true.

Syntax:

while (condition)  {
            code to be executed;
  }

The do...while Statement: The do...while statement will always execute the block of code once, it will then check the condition, and repeat the loop while the condition is true.

Syntax:

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

The for Loop: The for loop is used when you know in advance how many times the script should run.

Syntax:

for (init; condition; increment){
            code to be executed;
  }

 

The foreach Loop: The foreach loop is used to loop through arrays.

Syntax:

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

For every loop iteration, the value of the current array element is assigned to $value (and the array pointer is moved by one) - so on the next loop iteration, you'll be looking at the next array value.

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