The HTML_TRUNC function escapes html and limits the returned string to p_length characters. This function returns the first p_length characters of an input clob and escapes them. You can use this function if the input clob might be too large to fit in a varchar2 variable and it is sufficient to only display the first part of it.
Syntax
APEX_ESCAPE.HTML_TRUNC (
p_string IN CLOB,
p_length IN NUMBER DEFAULT 4000 )
return VARCHAR2;
Parameters
Table 9-4 describes the parameters available in the HTML_TRUNC function.
Table 9-4 HTML_TRUNC Function Parameters
| Parameter | Description |
|---|---|
|
|
The text string that is escaped. |
|
|
The number of characters from |
Example
This example generates a html list of of titles and text bodies. Html entity attributes are escaped with HTML_ATTRIBUTE, whereas normal text is escaped with HTML and HTML_TRUNC.
begin
htp.p('<ul>');
for l_data in ( select title, cls, body
from my_topics )
loop
sys.htp.p('<li><span class="'||
apex_escape.html_attribute(l_data.cls)||'">'||
apex_escape.html(l_data.title)||'</span>');
sys.htp.p(apex_escape.html_trunc(l_data.body));
sys.htp.p('</li>');
end loop;
htp.p('</ul>');
end;