<table border="1" class="CALSTABLE">
<colgroup> <col></col> <col></col> <col></col> <col></col> </colgroup> <tr>
<th>
ID
</th>
<th>
Name
</th>
<th>
Options
</th>
<th>
Flags
</th>
<th>
Description
</th>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_INT</strong></tt>
</td>
<td>
"int"
</td>
<td>
<code class="parameter">min_range</code>, <code class="parameter">max_range</code>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_ALLOW_OCTAL</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ALLOW_HEX</strong></tt>
</td>
<td>
Validates value as integer, optionally from the specified range.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_BOOLEAN</strong></tt>
</td>
<td>
"boolean"
</td>
<td>
</td>
<td>
</td>
<td>
Returns <tt class="constant"><strong>TRUE</strong></tt> for "1", "true", "on" and "yes", <tt class="constant"><strong>FALSE</strong></tt> for "0", "false", "off", "no", and "", <tt class="constant"><strong>NULL</strong></tt> otherwise.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_FLOAT</strong></tt>
</td>
<td>
"float"
</td>
<td>
</td>
<td>
</td>
<td>
Validates value as float.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_REGEXP</strong></tt>
</td>
<td>
"validate_regexp"
</td>
<td>
<code class="parameter">regexp</code>
</td>
<td>
</td>
<td>
Validates value against <code class="parameter">regexp</code>, a <a href="ref.pcre.html">Perl-compatible</a> regular expression.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_URL</strong></tt>
</td>
<td>
"validate_url"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_SCHEME_REQUIRED</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_HOST_REQUIRED</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_PATH_REQUIRED</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_QUERY_REQUIRED</strong></tt>
</td>
<td>
Validates value as URL, optionally with required components.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_EMAIL</strong></tt>
</td>
<td>
"validate_email"
</td>
<td>
</td>
<td>
</td>
<td>
Validates value as e-mail.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_VALIDATE_IP</strong></tt>
</td>
<td>
"validate_ip"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_IPV4</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_IPV6</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_NO_PRIV_RANGE</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_NO_RES_RANGE</strong></tt>
</td>
<td>
Validates value as IP address, optionally only IPv4 or IPv6 or not from private or reserved ranges.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_STRING</strong></tt>
</td>
<td>
"string"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_NO_ENCODE_QUOTES</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_STRIP_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_STRIP_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_AMP</strong></tt>
</td>
<td>
Strip tags, optionally strip or encode special characters.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_STRIPPED</strong></tt>
</td>
<td>
"stripped"
</td>
<td>
</td>
<td>
</td>
<td>
Alias of "string" filter.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_ENCODED</strong></tt>
</td>
<td>
"encoded"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_STRIP_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_STRIP_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_HIGH</strong></tt>
</td>
<td>
URL-encode string, optionally strip or encode special characters.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_SPECIAL_CHARS</strong></tt>
</td>
<td>
"special_chars"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_STRIP_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_STRIP_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_HIGH</strong></tt>
</td>
<td>
HTML-escape <tt class="literal">'"<>&</tt> and characters with ASCII value less than 32, optionally strip or encode other special characters.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_UNSAFE_RAW</strong></tt>
</td>
<td>
"unsafe_raw"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_STRIP_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_STRIP_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_LOW</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_HIGH</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ENCODE_AMP</strong></tt>
</td>
<td>
Do nothing, optionally strip or encode special characters.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_EMAIL</strong></tt>
</td>
<td>
"email"
</td>
<td>
</td>
<td>
</td>
<td>
Remove all characters except letters, digits and <tt class="literal">!#$%&'*+-/=?^_`{|}~@.[]</tt>.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_URL</strong></tt>
</td>
<td>
"url"
</td>
<td>
</td>
<td>
</td>
<td>
Remove all characters except letters, digits and <tt class="literal">$-_.+!*'(),{}|\\^~[]`<>#%";/?:@&=</tt>.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_NUMBER_INT</strong></tt>
</td>
<td>
"number_int"
</td>
<td>
</td>
<td>
</td>
<td>
Remove all characters except digits and <tt class="literal">+-</tt>.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_NUMBER_FLOAT</strong></tt>
</td>
<td>
"number_float"
</td>
<td>
</td>
<td>
<tt class="constant"><strong>FILTER_FLAG_ALLOW_FRACTION</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ALLOW_THOUSAND</strong></tt>, <tt class="constant"><strong>FILTER_FLAG_ALLOW_SCIENTIFIC</strong></tt>
</td>
<td>
Remove all characters except digits, <tt class="literal">+-</tt> and optionally <tt class="literal">.,eE</tt>.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_SANITIZE_MAGIC_QUOTES</strong></tt>
</td>
<td>
"magic_quotes"
</td>
<td>
</td>
<td>
</td>
<td>
Apply <a href="function.addslashes.html"><strong class="function">addslashes()</strong></a>.
</td>
</tr>
<tr>
<td>
<tt class="constant"><strong>FILTER_CALLBACK</strong></tt>
</td>
<td>
"callback"
</td>
<td>
</td>
<td>
<a href="language.pseudo-types.html#language.types.callback"><strong class="type">callback</strong></a> function or method
</td>
<td>
Call user-defined function to filter data.
</td>
</tr>
</table>
<td class="v">
enabled
</td>
</tr>
<tr>
<td class="e">
Revision
</td>
<td class="v">
$Revision: 1.52.2.39 $
</td>
</tr>
<th>
Local Value
</th>
<th>
Master Value
</th>
</tr>
<tr>
<td class="e">
filter.default
</td>
<td class="v">
unsafe_raw
</td>
<td class="v">
unsafe_raw
</td>
</tr>
<tr>
<td class="e">
filter.default_flags
</td>
<td class="v">
<em>no value</em>
</td>
<td class="v">
<em>no value</em>
</td>
</tr>