Loops In PHP (For, While, Do-While, Foreach)

PHP Loops

• PHP Loops perform repetitive tasks such as:
  • Retrieving information stored in databases
  • Sending mails to multiple users
  • Reading contents of an array
• Loops provided by PHP are as follows:
  • FOR
  • WHILE
  • DO-WHILE
  • FOREACH

Working with Loops In PHP

• Executes a block of code repetitively
• Tests the specified condition
  • If true, the statements present in the body of the loop are executed repetitively
  • If false, the loop ends, and the control is transferred to the statement following the loop
• The continuous execution of statements inside the loop is called iteration

FOR LOOP In PHP

• For loop executes block of code repetitively for a fixed number of times
• Statements in the loop body are executed as long as the condition is satisfied
• Stops the execution only when the condition is not satisfied

WHILE LOOP In PHP

• Validity of the condition is checked before the loop is executed:
  • If condition is true, statements are executed in the loop body
  • If condition is false, the body of the loop is not executed
• The condition is the test expression consisting of variables and operators

Do-while Loop In PHP

• Condition is checked at the end of the loop .
• Executes the loop body at least once .
• Works similar to the while loop

Jump Statements In PHP

• Jump Statements control the execution of the loop and conditional statements
• PHP provides the following jump statements:
  • break
  • continue
  • exit

Break Statement In PHP

• Creak statement stops the execution of the loops and conditional statements
• The control is then transferred either to the beginning of the next loop or to the statement following the loop
• Can be used with the if statement, switch statement, for loop, while loop, and do-while loop.

Continue Statement In PHP

• Continue statement used within the loop statements
• Skips the code following the continue statement in the loop body and executes the next iteration of the loop
• Can be used with the if statement, for loop, while loop, and do-while loop

Exit Statement In PHP

• Exit statement stops the execution of the loops and conditional statements
• When exit statement occurs program will exit.

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