PHP 101: flow control - Speaker Deck

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PHP 101: flow control Fundamental PHP & Web Development lecturer : Lucien Lee 李柏緯 Lecture 2

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? What is flow control 2

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3 eat SLEEP DRINK PUPU Straight Life

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4 Real Life is complicated

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5 Based Condition, Decide what to do.

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IF 6 if something happen, what should we do?

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IF •If my dog is gone, I call its name. 7

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IF if($dog == ‘gone’){ echo “Where are you, Lucy!”; } 8

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IF..ELSE.. 9 more statement to if not

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ELSE •If my dog is gone, I call its name; else I play with it. 10

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ELSE if($dog == ‘gone’){ echo “Where are you, Lucy!”; }else{ $myState = “play”; } 11

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ELSEIF 12 Give MOre condition and RESPonse

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ESLEIF •If my dog is gone, I call its name; else if my dog is eating, I go to eat. 13

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ELSEIF if($dog == ‘gone’){ echo “Where are you, Lucy!”; }elseif($dog == ‘eating’){ $myState = “go to eat”; } 14

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? LOOP 15

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16 eat SLEEP DRINK PUPU But you get older

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17 for Do one by one, until satisfy condition.

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18 for •Count from 1 to 10.

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for for($i=1; $i<=10; $i++){ echo $i.’
’; } 19

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20 while Do again by again, until satisfy condition.

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21 while •Count from 1 to 10.

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while $i=1 while($i<=10){ echo $i.’
’; i++; } 22

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23 foreach traverse array one by one

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foreach $price = array(“apple”=>100, ”orange”=>150, “banana”=>200); foreach($price as $key => $value){ echo “水果: ”. $key.”/價錢: ”. $value; } 24

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ARRAY Part 2 25

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? Multi-Array 26

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ARRAY •a collection of data items. •key map to value. •Like many box put together. 27 Apple 100 Orange 150 Banana 200

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28 0 1 2 0 A B C 1 D E F 2 G H I Multi-Case

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Multi-Array 29 $array[0][‘cool’] = ‘awesome’; $array[1] = “XD”; $array[0][1][‘yeah’] = “yo”; //wrong case $array[0]=100;

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key-value 30 red white yellow purple ﬂower rose lily sumﬂower fruit apple pear banana grape

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Multi-Array 31 $set=array( ‘flower’=>array(‘red’=>‘rose’,‘whit e’=>‘lily’,‘yellow’=>‘sunflower’), ‘fruit’=>array(‘red’=>‘apple’, ‘white’=>‘pear’,‘yellow’=>‘banana’, ‘purple’=>‘grape’) );

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+ union two array 32

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two array plus $item1 = array(‘rose’,‘lily’); $item2 = array(‘apple’,‘banana’,‘grape’); $items = $item1 + $item2; //$items = array(‘rose’,‘lily’, ‘grape’); 33

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array_push() add a new data to array 34

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array_pop() remove last data from array 35

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Live Coding 36

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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