A summary of PHP escape characters

I recently encountered code conversion problems in writing bbs. After searching for a long time, we can get a perfect solution to completely restore the author's original article.

I recently encountered code conversion problems in writing bbs. After searching for a long time, we can get a perfect solution to completely restore the author's original article.

The following post is for your correction.

System: linux php4 oracle8i

2. // -- Import the title, name, and other fields into the database (with spaces at the beginning and end)
3. Function trans_string_trim ($ str ){
4. $ Str = trim ($ str );
5. $ Str = eregi_replace ("'", "'' ", $ str );
6. $ Str = stripslashes ($ str );
7. Return $ str;
8. }
9.  
10. // -- Process the input of an article, that is, the textarea field;
11. Function trans_string ($ str ){
12. $ Str = eregi_replace ("'", "'' ", $ str );
13. $ Str = stripslashes ($ str );
14. Return $ str;
15. }
16.  
17. // -- Display the data in the form from the library; convert the data in text to trans. in textarea, the data is directly displayed without conversion.
18.  
19. // -- Display the HTML code on the WEB page, including the link address
20. Function trans ($ string ){
21. $ String = htmlspecialchars ($ string );
22. $ String = ereg_replace (chr (10 ),"
    ", $ String );
23. $ String = ereg_replace (chr (32), "", $ string );
24. Return $ string;
25. }
26.  
27. // -- Display on the WEB page without filtering HTML code;
28. Function trans_web ($ string ){
29. $ String = ereg_replace (chr (10 ),"
    ", $ String );
30. $ String = ereg_replace (chr (32), "", $ string );
31. Return $ string;
32. }
33.  
34. // -- Display HTML code and leading and trailing spaces on the WEB page, mainly used to display user nicknames
35. Function trans_trim ($ string ){
36. $ String = trim ($ string );
37. $ String = htmlspecialchars ($ string );
38. $ String = ereg_replace (chr (10 ),"
    ", $ String );
39. $ String = ereg_replace (chr (32), "", $ string );
40. Return $ string;
41. }
42.  
43. // -- Display in span;
44. Function trans_span ($ string ){
45. $ String = ereg_replace (chr (10), "n", $ string );
46. $ String = ereg_replace (chr (32), "", $ string );
47. $ String = ereg_replace ('"'," ", $ string );
48. Return $ string;
49. }
50.  
51. // -- Display cookies on the WEB to filter html
52. Function trans_cookie ($ str ){
53. $ Str = trans ($ str );
54. $ Str = stripslashes ($ str );
55. $ Str = eregi_replace ("'' "," '", $ str );
56. Return $ str;
57. }
58. ?>

Finally, we can add one additional point. if we show a section in the article in span and use substr to take a fixed-length string, remember to add a space after the span parameter, otherwise, html code will be messy when half of Chinese characters are captured.