A summary of 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. The following post is for your correction. System: linux + php4 + oracle8i? -- Input the title, name, and other fields into the database (with spaces at the beginning and end) functiontrans_string_trim ($ str) {$ strtrim ($ str); $ str 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

// -- Import the title, name, and other fields into the database (with spaces at the beginning and end)
Function trans_string_trim ($ str ){
$ Str = trim ($ str );
$ Str = eregi_replace ("'", "'' ", $ str );
$ Str = stripslashes ($ str );
Return $ str;
}

// -- Process the input of an article, that is, the textarea field;
Function trans_string ($ str ){
$ Str = eregi_replace ("'", "'' ", $ str );
$ Str = stripslashes ($ str );
Return $ str;
}

// -- 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.

// -- Display the HTML code on the WEB page, including the link address
Function trans ($ string ){
$ String = htmlspecialchars ($ string );
$ String = ereg_replace (chr (10 ),"
", $ String );
$ String = ereg_replace (chr (32), "", $ string );
Return $ string;
}

// -- Display on the WEB page without filtering HTML code;
Function trans_web ($ string ){
$ String = ereg_replace (chr (10 ),"
", $ String );
$ String = ereg_replace (chr (32), "", $ string );
Return $ string;
}

// -- Display HTML code and leading and trailing spaces on the WEB page, mainly used to display user nicknames
Function trans_trim ($ string ){
$ String = trim ($ string );
$ String = htmlspecialchars ($ string );
$ String = ereg_replace (chr (10 ),"
", $ String );
$ String = ereg_replace (chr (32), "", $ string );
Return $ string;
}

// -- Display in span;
Function trans_span ($ string ){
$ String = ereg_replace (chr (10), "n", $ string );
$ String = ereg_replace (chr (32), "", $ string );
$ String = ereg_replace ('"'," ", $ string );
Return $ string;
}

// -- Display cookies on the WEB to filter html
Function trans_cookie ($ str ){
$ Str = trans ($ str );
$ Str = stripslashes ($ str );
$ Str = eregi_replace ("'' "," '", $ str );
Return $ str;
}
?>
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Finally, add another note. if the section in the article is displayed in span and the fixed length string is obtained using substr, add a space after the span parameter, otherwise, html code will be messy when half of Chinese characters are captured.