PHP 101: flow control

Fundamental PHP & Web Development

Transcript

1. PHP 101: flow control Fundamental PHP & Web Development lecturer : Lucien Lee 李柏緯 Lecture 2
2. ? What is flow control 2
3. 3 eat SLEEP DRINK PUPU Straight Life
4. 4 Real Life is complicated
5. 5 Based Condition, Decide what to do.
6. IF 6 if something happen, what should we do?
7. IF •If my dog is gone, I call its name. 7
8. IF if($dog == ‘gone’){ echo “Where are you, Lucy!”; } 8
9. IF..ELSE.. 9 more statement to if not
10. ELSE •If my dog is gone, I call its name; else I play with it. 10
11. ELSE if($dog == ‘gone’){ echo “Where are you, Lucy!”; }else{ $myState = “play”; } 11
12. ELSEIF 12 Give MOre condition and RESPonse
13. ESLEIF •If my dog is gone, I call its name; else if my dog is eating, I go to eat. 13
14. ELSEIF if($dog == ‘gone’){ echo “Where are you, Lucy!”; }elseif($dog == ‘eating’){ $myState = “go to eat”; } 14
15. ? LOOP 15
16. 16 eat SLEEP DRINK PUPU But you get older
17. 17 for Do one by one, until satisfy condition.
18. 18 for •Count from 1 to 10.
19. for for($i=1; $i<=10; $i++){ echo $i.’<br>’; } 19
20. 20 while Do again by again, until satisfy condition.
21. 21 while •Count from 1 to 10.
22. while $i=1 while($i<=10){ echo $i.’<br>’; i++; } 22
23. 23 foreach traverse array one by one
24. foreach $price = array(“apple”=>100, ”orange”=>150, “banana”=>200); foreach($price as $key => $value){ echo “水果: ”. $key.”/價錢: ”. $value; } 24
25. ARRAY Part 2 25
26. ? Multi-Array 26
27. ARRAY •a collection of data items. •key map to value. •Like many box put together. 27 Apple 100 Orange 150 Banana 200
28. 28 0 1 2 0 A B C 1 D E F 2 G H I Multi-Case
29. Multi-Array 29 $array[0][‘cool’] = ‘awesome’; $array[1] = “XD”; $array[0][1][‘yeah’] = “yo”; //wrong case $array[0]=100;
30. key-value 30 red white yellow purple flower rose lily sumflower fruit apple pear banana grape
31. Multi-Array 31 $set=array( ‘flower’=>array(‘red’=>‘rose’,‘whit e’=>‘lily’,‘yellow’=>‘sunflower’), ‘fruit’=>array(‘red’=>‘apple’, ‘white’=>‘pear’,‘yellow’=>‘banana’, ‘purple’=>‘grape’) );
32. + union two array 32
33. two array plus $item1 = array(‘rose’,‘lily’); $item2 = array(‘apple’,‘banana’,‘grape’); $items = $item1 + $item2; //$items = array(‘rose’,‘lily’, ‘grape’); 33
34. array_push() add a new data to array 34
35. array_pop() remove last data from array 35
36. Live Coding 36
37. HomeWork 37 • make key-value array to save student grade. • All grade * 1.4, if modified grade over 100, modify in another way:original value + (100 - original value)*0.1 • change array as name map to array save grade and pass or not. a b c d e f 30 40 90 60 55 80