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constants.xml
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constants.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<appendix xml:id="pcre.constants" xmlns="http://docbook.org/ns/docbook">
&reftitle.constants;
&extension.constants;
<table>
<title>PREG constants</title>
<tgroup cols="2">
<thead>
<row>
<entry>&Constants;</entry>
<entry>&Description;</entry>
<entry>As of</entry>
</row>
</thead>
<tbody>
<row xml:id="constant.preg-pattern-order">
<entry>
<constant>PREG_PATTERN_ORDER</constant>
(<type>int</type>)
</entry>
<entry>
Orders results so that <varname>$matches[0]</varname> is an array of full pattern
matches, <varname>$matches[1]</varname> is an array of strings matched by the first
parenthesized subpattern, and so on. This flag is only used with
<function>preg_match_all</function>.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-set-order">
<entry>
<constant>PREG_SET_ORDER</constant>
(<type>int</type>)
</entry>
<entry>
Orders results so that <varname>$matches[0]</varname> is an array of first set of
matches, <varname>$matches[1]</varname> is an array of second set of matches, and so
on. This flag is only used with <function>preg_match_all</function>.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-offset-capture">
<entry>
<constant>PREG_OFFSET_CAPTURE</constant>
(<type>int</type>)
</entry>
<entry>
See the description of
<constant>PREG_SPLIT_OFFSET_CAPTURE</constant>.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-split-no-empty">
<entry>
<constant>PREG_SPLIT_NO_EMPTY</constant>
(<type>int</type>)
</entry>
<entry>
This flag tells <function>preg_split</function> to return only non-empty
pieces.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-split-delim-capture">
<entry>
<constant>PREG_SPLIT_DELIM_CAPTURE</constant>
(<type>int</type>)
</entry>
<entry>
This flag tells <function>preg_split</function> to capture
parenthesized expression in the delimiter pattern as well.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-split-offset-capture">
<entry>
<constant>PREG_SPLIT_OFFSET_CAPTURE</constant>
(<type>int</type>)
</entry>
<entry>
If this flag is set, for every occurring match the appendant string
offset will also be returned. Note that this changes the return
values in an array where every element is an array consisting of the
matched string at offset 0 and its string offset within subject at
offset 1. This flag is only used for <function>preg_split</function>.
</entry>
<entry/>
</row>
<row xml:id="constant.preg-unmatched-as-null">
<entry>
<constant>PREG_UNMATCHED_AS_NULL</constant>
(<type>int</type>)
</entry>
<entry>
This flag tells <function>preg_match</function> and
<function>preg_match_all</function> to include unmatched subpatterns in
<varname>$matches</varname> as &null; values. Without this flag, unmatched
subpatterns are reported as empty strings, as if they were empty matches.
Setting this flag allows to distinguish between these two cases.
</entry>
<entry>7.2.0</entry>
</row>
<row xml:id="constant.preg-no-error">
<entry>
<constant>PREG_NO_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if there were no
errors.
</entry>
<entry>5.2.0</entry>
</row>
<row xml:id="constant.preg-internal-error">
<entry>
<constant>PREG_INTERNAL_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if there was an
internal PCRE error.
</entry>
<entry>5.2.0</entry>
</row>
<row xml:id="constant.preg-backtrack-limit-error">
<entry>
<constant>PREG_BACKTRACK_LIMIT_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if <link linkend="ini.pcre.backtrack-limit">backtrack limit</link> was exhausted.
</entry>
<entry>5.2.0</entry>
</row>
<row xml:id="constant.preg-recursion-limit-error">
<entry>
<constant>PREG_RECURSION_LIMIT_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if <link linkend="ini.pcre.recursion-limit">recursion limit</link> was exhausted.
</entry>
<entry>5.2.0</entry>
</row>
<row xml:id="constant.preg-bad-utf8-error">
<entry>
<constant>PREG_BAD_UTF8_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if the last error was
caused by malformed UTF-8 data (only when running a regex in <link linkend="reference.pcre.pattern.modifiers">UTF-8 mode</link>).
</entry>
<entry>5.2.0</entry>
</row>
<row xml:id="constant.preg-bad-utf8-offset-error">
<entry>
<constant>PREG_BAD_UTF8_OFFSET_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if the offset didn't
correspond to the begin of a valid UTF-8 code point (only when running
a regex in <link linkend="reference.pcre.pattern.modifiers">UTF-8
mode</link>).
</entry>
<entry>5.3.0</entry>
</row>
<row xml:id="constant.preg-jit-stacklimit-error">
<entry>
<constant>PREG_JIT_STACKLIMIT_ERROR</constant>
(<type>int</type>)
</entry>
<entry>
Returned by <function>preg_last_error</function> if the last PCRE function
failed due to limited JIT stack space.
</entry>
<entry>7.0.0</entry>
</row>
<row xml:id="constant.pcre-version">
<entry>
<constant>PCRE_VERSION</constant>
(<type>string</type>)
</entry>
<entry>
PCRE version and release date (e.g. "<literal>7.0 18-Dec-2006</literal>").
</entry>
<entry>5.2.4</entry>
</row>
<row xml:id="constant.pcre-version-major">
<entry>
<constant>PCRE_VERSION_MAJOR</constant>
(<type>int</type>)
</entry>
<entry>
PCRE major version number.
</entry>
<entry></entry>
</row>
<row xml:id="constant.pcre-version-minor">
<entry>
<constant>PCRE_VERSION_MINOR</constant>
(<type>int</type>)
</entry>
<entry>
PCRE minor version number.
</entry>
<entry></entry>
</row>
<row xml:id="constant.pcre-jit-support">
<entry>
<constant>PCRE_JIT_SUPPORT</constant>
(<type>bool</type>)
</entry>
<entry>
Indicates whether PCRE JIT support is available.
</entry>
<entry></entry>
</row>
<row xml:id="constant.preg-grep-invert">
<entry>
<constant>PREG_GREP_INVERT</constant>
(<type>int</type>)
</entry>
<entry>
Return the elements that do not match a given pattern.
</entry>
<entry></entry>
</row>
</tbody>
</tgroup>
</table>
</appendix>
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