Php modul-2
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This document provides an overview of control structures and loops in PHP including if/elseif/else statements for selection, switch statements, while, do-while and for loops, and functions. Examples are given for each control structure and loop to demonstrate their syntax and usage. The document also lists some exercises for students to practice PHP programming concepts like determining the largest of two or three numbers, checking if a number is odd or even, writing loops to output numbers, and using functions.
Php modul-2
- 1. Control Statement PHP - TUTORIAL
- 2. Selection ● IF ● IF … ELSE ● ELSEIF ● SWITCH
- 3. Selection - IF ● IF <expression> statement-true; ● ex. $name=”kris”; IF ($name==”kris”) echo “Welcome Kris.”;
- 4. Selection – IF … ELSE ● IF <expression> statement-true; ELSE statement-false;
- 5. Selection – IF … ELSE ● Ex. $name=”Kris”; IF ($name=”kris”) echo “Welcome Kris.”; ELSE echo “You're not Kris.”;
- 6. Selection - ELSEIF ● IF <expression1> statement-true1; ELSEIF <expression2> statement-true2; ELSE statement-false;
- 7. Selection - ELSEIF $name=”John”; IF ($name==”Kris”) echo “Welcome Kris.”; ELSEIF ($name==”John”) echo “Welcome John.”;
- 8. Selection - Switch Switch (variable) { case <value1>: statement-1; break; case <value2>: statement-2; break; default: statement-default; break; }
- 9. Selection - Switch $destination=”Paris”; switch ($destination) { case “Tokyo”: echo “Bring extra 1000 $US”; break; case “Egypt”: echo “Bring bulletproof vests”; break; case “Paris”: echo “Bring a camera”; break; default: echo “Dont' bring anything”; break; }
- 10. Loop ● While ● Do While ● For ● Foreach
- 11. Loop - While ● While (expression-true) { statement; } ● Ex. $i=0; While ($i<=10) { echo $i . “<br />”; $i++; }
- 12. Loop – Do While Do { statement; } while (expression);
- 13. Loop – Do While $a=0; do { echo $a . “<br/>”; } while ($a>0);
- 14. Loop - For ● For (start; stop; increment) { statement; } ● Ex. For ($b=0; $b<=10; $b++) { echo $b . “<br />”; }
- 15. Loop – Foreach ● foreach ($array as $value){ statement; } ● Ex. $colors = array("red","green","blue","yellow"); foreach ($colors as $value) { echo "$value <br>"; }
- 16. Function ● Is a block of code that can be executed whenever we need it ● Function <name>(parameters) { statement; return }
- 17. Simple function function say() { echo “Nice to meet you.”; } echo “Hello Kris, ”; say();
- 18. Function with Parameters function say($name) { echo “<br />Nice to meet you, “. $name; } echo “Hello, John.”; say(“John”);
- 19. Simple function function say() { echo “Nice to meet you.”; } echo “Hello Kris, ”; say();
- 20. Function that returning values function add($x, $y) { $total = $x + $y; return $total; } $num=0; echo “My number is “ . $num . ”<br />”; $num = add(5,6); echo “Now, my number is “ . $num;
- 21. Excercise 1. Write a php program to determine which one is the biggest number from 2 numbers 2. Write a php program to determine which one is the biggest number from 3 numbers 3. Write a php program which can determine a number is odd or even 4. Write number from 1 to 20 with while, do while, and for 5. Write even number from 1 to 20 with while, do while, and for 6. Write odd number from 1 to 20 with while, do while, and for
- 22. Homework ● Write a php program to determine the letter grade from given number input (hint: use a function to generate the letter grade) ● Add a function to exercise number 1, 2, and 3