php 效率的字符串处理方法

php效率的字符串处理方法,代码如下:

1. <?php 
2. $str = array( 
3. "helloworld", 
4. "howareyou", 
5. "cpufrequency", 
6. "windows7ready", 
7. "newedition2", 
8. "downloadurllist", 
9. "heisasuperhero", 
10. ); 
11. //你的解决方法 
12. /* 
13. 正确添加空格后应为： 
14. "helloworld" = "hello world" 
15. "howareyou" = "how are you" 
16. "cpufrequency" = "cpu frequency" 
17. "windows7ready" = "windows 7 ready" 
18. "newedition2" = "new edition 2" 
19. "downloadurllist" = "download url list" 
20. "heisasuperhero" = "he is a super hero" 
21. */ 
22. ?> 

程序代码如下:

1. function transfer($input) { 
2.         $newarray = array(); 
3.         foreach($input as $i) { 
4.                 $arr = str_split($i); 
5.                 $word = ''; 
6.                 foreach($arr as $a) { 
7.                         $ascii = ord($a); 
8.                         $lastword = substr($word, -1); 
9.                         $ascii_1 = ord($lastword); 
10.                         $lastword_ = substr($word, -2, 1); 
11.                         if($ascii > 64 && $ascii < 91) { 
12.                                 if($ascii_1 > 96 && $ascii_1 < 122) { 
13.                                         $word .= ' '.$a; 
14.                                 } else { 
15.                                         $word .= $a; 
16.                                 } 
17.                         } elseif($ascii > 96 && $ascii < 122) { 
18.                                 if($ascii_1 > 64 && $ascii_1 < 91) { 
19.                                         if(strlen($word) == 1) { 
20.                                                 $word .= $a; 
21.                                         } else { 
22.                                                 if(ord($lastword_) == 32) { 
23.                                                         $word .= $a; 
24.                                                 } else { 
25.                                                         $word = substr($word, 0, -1).' '.$lastword.$a; 
26.                                                 } 
27.                                         } 
28.                                 } else { 
29.                                         $word .= $a; 
30.                                 } 
31.                         } else { 
32.                                 if(strlen($word) == 0) { 
33.                                         $word .= $a; 
34.                                 } else { 
35.                                         $word .= ' '.$a; 
36.                                 } 
37.                         } 
38.                 } 
39.                 $newarray[$i] = $word; 
40.         } 
41.         return $newarray; 
42. } 
43.  
44. print_r(transfer($str));