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Implemented zak's notes on addcslashes

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@50266 c90b9560-bf6c-de11-be94-00142212c4b1
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Jeroen van Wolffelaar 2001-06-27 09:58:49 +00:00
parent bf4a4681e2
commit f53dce95c0
1 changed files with 39 additions and 3 deletions
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42
functions/strings.xml
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@ -38,8 +38,17 @@
listed in <parameter>charlist</parameter> parameter. It escapes
<literal>\n</literal>, <literal>\r</literal> etc. in C-like
style, characters with ASCII code lower than 32 and higher than
126 are converted to octal representation. Be carefull when
escaping alphanumeric characters. You can specify a range in
126 are converted to octal representation.
</para>
<para>
Be careful if you choose to escape characters 0, a, b, f, n, r,
t and v. They will be converted to \0, \a, \b, \f, \n, \r, \t
and \v.
In PHP \0 (NULL), \r (carriage return), \n (newline) and \t (tab)
are predefined escape sequences, while in C all of these are
predefined escape sequences.
</para>
<para>
<parameter>charlist</parameter> like "\0..\37", which would
escape all characters with ASCII code between 0 and 31.
<example>
@ -48,9 +57,36 @@
$escaped = addcslashes ($not_escaped, "\0..\37!@\177..\377");
</programlisting>
</example>
</para>
<para>
When you define a sequence of characters in the charlist argument
make sure that you know what characters come between the characters
that you set as the start and end of the range.
<informalexample>
<programlisting role="php">
echo addcslashes('foo[]', 'A..z');
// All upper and lower-case letters will be escaped
// ..but so will the [\]^_` and space characters.
</programlisting>
</informalexample>
Also, if the first character in a range has a lower ASCII value
than the second character in the range, no range will be constructed.
Only the start, end and period characters will be escaped. Use the
<function>ord</function> function to find the ASCII value for a character.
<informalexample>
<programlisting role="php">
echo addcslashes("zoo['.']", 'z..A');
/* output:
\zoo['\.']
*/
</programlisting>
</informalexample>
<note>
<simpara>
Added in PHP4b3-dev.</simpara>
Added in PHP 4</simpara>
</note>
</para>
<para>