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4-3-3   ¨ç¼Æªº¦^¶Ç­È
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­nÅý±N³B²zµ²ªG¶Ç¦^©I¥s¥¦ªº¥Dµ{¦¡°Ï¬q¡A¥i¦b¨ç¼Æ§Y±Nµ²§ô¤§«e¡A¨Ï¥Î¡ureturn¡v©R¥O¶Ç¦^¯S©wªº¸ê®Æ­È¦¨¬°¨ç¼Æªº¦^¶Ç­È¡A¨Ò¦p¡G

1. <?
   
2. function MyTest($num)
   
3. {
   
4. $ans=1;
   
5. for ($x=1 ; $x<=$num ; $x++)
   
6.   {
   
7.     $ans=$ans * $x ;
   
8.   }
   
9. return $ans;  //¦^¶Ç¹Bºâµ²ªG
   
10. }
    
11. ?>

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©I¥s¨ç¼Æ®É¡A¦³°Ñ¼Æ¶Ç»¼®É¡A°Ñ¼Æ¤§¥~­n¥Î¤@¹ï¬A¸¹¥]¬A°_¨Ó¡A­YµL°Ñ¼Æ¶Ç»¼®É¡A¥[¤£¥[¬A¸¹³£¥i¥H¡A¤£¹L¡A²ßºD¤W¦b©I¥s¨ç¼Æ®É¡A§Y¨Ï¨S¦³°Ñ¼Æ¶Ç»¼³£ÁÙ¬O·|¥[¤W¤@¹ï¬A¸¹¡C

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¼g¤@¨ç¼Æ¡A¶Ç¤J¼Æ¦r1~12¡A±µµÛ¦^¶Ç¸Ó¼Æ¦r¹ïÀ³ªº©u¸`¡A¨Ò¦p¶Ç¤J°Ñ¼Æ3¦^¶Ç¡u¬K¤Ñ¡v¡C(½d¨Ò¥úºÐtest04_01.php)
test04_01.php

1. <?
   
2. function moontest($moon)
   
3. {
   
4. switch ($moon)
   
5.   {
   
6.     case 1: case 2: case 3:
   
7.           return "¬K¤Ñ";
   
8.           break;
   
9.     case 4: case 5: case 6:
   
10.           return "®L¤Ñ";
    
11.           break;
    
12.     case 7: case 8: case 9:
    
13.           return "¬î¤Ñ";
    
14.           break;
    
15.     case 10: case 11: case 12:
    
16.           return "¥V¤Ñ";
    
17.           break;
    
18.     default:
    
19.           echo "¿ù»~";
    
20.   }
    
21. }
    
22. ?>
    
23. 
    
24. <HTML>
    
25. <HEAD>
    
26. <TITLE>test04_01</TITLE>
    
27. </HEAD>
    
28. <BODY>
    
29. <?
    
30. //§ì¨ú¨t²Î¤é´Á®É¶¡¥Ø«eªº¤ë¥÷
    
31. $mymoon=date("n");
    
32. //©I¥s¨ç¼Æ¨ú±o¹ïÀ³ªº©u¸`
    
33. $season=moontest($mymoon);
    
34. echo "¥Ø«e©u¸`¬° : $season";
    
35. ?>
    
36. </BODY></HTML>

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¼g¤@¨ç¼Æ¡A±N¶Ç¤Jªº¦r¦ê¤Ï¦V¦C¦L¥X¨Ó¡A¨Ò¦p¶Ç¤JMicrosoft¦^¶Ç¿é¥XtfosorciM¡A¥»ÃD¦³ÂI²`«×¡A¹B¥Î¨ì¤º«Øªºstrlen()¡Bsubstr()¦r¦ê¨ç¼Æ¡C(½d¨Ò¥úºÐtest04_02.php)
test04_02.php

1. <?
   
2. function Mystring($testword)
   
3. {
   
4. $strlong=strlen($testword);
   
5. $ansstr="";
   
6. for ($x=$strlong ; $x>=0 ; $x--)
   
7.   {
   
8.     $ansstr=$ansstr . substr($testword,$x,1);
   
9.   }
   
10. return $ansstr;
    
11. }
    
12. ?>
    
13. 
    
14. <HTML>
    
15. <HEAD>
    
16. <TITLE>test04_02</TITLE>
    
17. </HEAD>
    
18. <BODY>
    
19. <?
    
20. $test="Microsoft";
    
21. echo (Mystring($test));
    
22. ?>
    
23. </BODY></HTML>

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strlen()¨ç¼Æ

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$myStr= ¡§Hello PHP¡¨; $myLen = strlen($mystr); //$'myLen = 9

substr()¨ç¼Æ

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¥Î³~¡G¶Ç¦^¥Ñ¦r¦ê¤¤«ü©w¦r¤¸¼Æ¶}©l¡A¥Ñ¥ª¦Ü¥k¨ú±o«ü©wªø«×¦r¤¸ªº¦r¦ê

$myStr= ¡§Hello PHP¡¨; $strMid = substr($myStr); //$'strMid = "lo P"

bubaby0608

1. <?php
   
2. $myStr= "Hello PHP";
   
3. $strMid = substr($myStr,3,4); //strMid = "lo P"
   
4. echo $strMid;
   
5. ?>

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