Lecture 3: Continue Fundamentals of PHP (Loops and Functions)

Overview: This lecture dives into control flow through iterative loops and creating modular code using PHP functions.

• PHP Loops:
  • while loop: Executes a block of code as long as a specified condition is true.
  • do...while loop: Executes the block of code once before checking the condition, then repeats as long as the condition remains true.
  • for loop: Loops through a block of code a specified number of times.
  • foreach loop: Specifically used to loop through each element (keys and values) in an array.
• Loop Control Statements:
  • break: Stops the loop completely and jumps out.
  • continue: Skips the current iteration and jumps immediately to the next iteration.
• PHP Functions:
  • Creation: Declared using the function keyword (e.g., function myMessage() { }).
  • Calling: Executed by calling the function's name followed by parentheses.
  • Arguments: Data passed into the function to be processed.
  • Default Argument Value: If an argument is declared with a default (e.g., $minheight = 50), calling the function without an argument will automatically use the default value.
  • Returning Values: The return statement is used to send a computed value back to the caller.