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</div><hr /><div id="mysqli.constants" class="appendix">
<h1>Predefined Constants</h1>
<p class="simpara">
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
</p>
<dl>
<dt id="constantmysqli-read-default-group">
<span class="term"><strong><code>MYSQLI_READ_DEFAULT_GROUP</code></strong></span>
<dd>
<p class="para">
Read options from the named group from <var class="filename">my.cnf</var>
or the file specified with <strong><code>MYSQLI_READ_DEFAULT_FILE</code></strong>
</p>
</dd>
</dt>
<dt id="constantmysqli-read-default-file">
<span class="term"><strong><code>MYSQLI_READ_DEFAULT_FILE</code></strong></span>
<dd>
<p class="para">
Read options from the named option file instead of from <var class="filename">my.cnf</var>
</p>
</dd>
</dt>
<dt id="constantmysqli-opt-connect-timeout">
<span class="term"><strong><code>MYSQLI_OPT_CONNECT_TIMEOUT</code></strong></span>
<dd>
<p class="para">
Connect timeout in seconds
</p>
</dd>
</dt>
<dt id="constantmysqli-opt-local-infile">
<span class="term"><strong><code>MYSQLI_OPT_LOCAL_INFILE</code></strong></span>
<dd>
<p class="para">
Enables command <em>LOAD LOCAL INFILE</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-init-command">
<span class="term"><strong><code>MYSQLI_INIT_COMMAND</code></strong></span>
<dd>
<p class="para">
Command to execute when connecting to MySQL server. Will automatically be re-executed when reconnecting.
</p>
</dd>
</dt>
<dt id="constantmysqli-client-ssl">
<span class="term"><strong><code>MYSQLI_CLIENT_SSL</code></strong></span>
<dd>
<p class="para">
Use SSL (encrypted protocol). This option should not be set by application programs;
it is set internally in the MySQL client library
</p>
</dd>
</dt>
<dt id="constantmysqli-client-compress">
<span class="term"><strong><code>MYSQLI_CLIENT_COMPRESS</code></strong></span>
<dd>
<p class="para">
Use compression protocol
</p>
</dd>
</dt>
<dt id="constantmysqli-client-interactive">
<span class="term"><strong><code>MYSQLI_CLIENT_INTERACTIVE</code></strong></span>
<dd>
<p class="para">
Allow <em>interactive_timeout</em> seconds
(instead of <em>wait_timeout</em> seconds) of inactivity before
closing the connection. The client's session
<em>wait_timeout</em> variable will be set to
the value of the session <em>interactive_timeout</em> variable.
</p>
</dd>
</dt>
<dt id="constantmysqli-client-ignore-space">
<span class="term"><strong><code>MYSQLI_CLIENT_IGNORE_SPACE</code></strong></span>
<dd>
<p class="para">
Allow spaces after function names. Makes all functions names reserved words.
</p>
</dd>
</dt>
<dt id="constantmysqli-client-no-schema">
<span class="term"><strong><code>MYSQLI_CLIENT_NO_SCHEMA</code></strong></span>
<dd>
<p class="para">
Don't allow the <em>db_name.tbl_name.col_name</em> syntax.
</p>
</dd>
</dt>
<dt id="constantmysqli-client-multi-queries">
<span class="term"><strong><code>MYSQLI_CLIENT_MULTI_QUERIES</code></strong></span>
<dd>
<p class="para">
Allows multiple semicolon-delimited queries in a single <span class="function"><a href="mysqli.query.html" class="function">mysqli_query()</a></span> call.
</p>
</dd>
</dt>
<dt id="constantmysqli-store-result">
<span class="term"><strong><code>MYSQLI_STORE_RESULT</code></strong></span>
<dd>
<p class="para">
For using buffered resultsets
</p>
</dd>
</dt>
<dt id="constantmysqli-use-result">
<span class="term"><strong><code>MYSQLI_USE_RESULT</code></strong></span>
<dd>
<p class="para">
For using unbuffered resultsets
</p>
</dd>
</dt>
<dt id="constantmysqli-assoc">
<span class="term"><strong><code>MYSQLI_ASSOC</code></strong></span>
<dd>
<p class="para">
Columns are returned into the array having the fieldname as the array index.
</p>
</dd>
</dt>
<dt id="constantmysqli-num">
<span class="term"><strong><code>MYSQLI_NUM</code></strong></span>
<dd>
<p class="para">
Columns are returned into the array having an enumerated index.
</p>
</dd>
</dt>
<dt id="constantmysqli-both">
<span class="term"><strong><code>MYSQLI_BOTH</code></strong></span>
<dd>
<p class="para">
Columns are returned into the array having both a numerical index and the fieldname as the associative index.
</p>
</dd>
</dt>
<dt id="constantmysqli-not-null-flag">
<span class="term"><strong><code>MYSQLI_NOT_NULL_FLAG</code></strong></span>
<dd>
<p class="para">
Indicates that a field is defined as <em>NOT NULL</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-pri-key-flag">
<span class="term"><strong><code>MYSQLI_PRI_KEY_FLAG</code></strong></span>
<dd>
<p class="para">
Field is part of a primary index
</p>
</dd>
</dt>
<dt id="constantmysqli-unique-key-flag">
<span class="term"><strong><code>MYSQLI_UNIQUE_KEY_FLAG</code></strong></span>
<dd>
<p class="para">
Field is part of a unique index.
</p>
</dd>
</dt>
<dt id="constantmysqli-multiple-key-flag">
<span class="term"><strong><code>MYSQLI_MULTIPLE_KEY_FLAG</code></strong></span>
<dd>
<p class="para">
Field is part of an index.
</p>
</dd>
</dt>
<dt id="constantmysqli-blob-flag">
<span class="term"><strong><code>MYSQLI_BLOB_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>BLOB</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-unsigned-flag">
<span class="term"><strong><code>MYSQLI_UNSIGNED_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>UNSIGNED</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-zerofill-flag">
<span class="term"><strong><code>MYSQLI_ZEROFILL_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>ZEROFILL</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-auto-increment-flag">
<span class="term"><strong><code>MYSQLI_AUTO_INCREMENT_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>AUTO_INCREMENT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-timestamp-flag">
<span class="term"><strong><code>MYSQLI_TIMESTAMP_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TIMESTAMP</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-set-flag">
<span class="term"><strong><code>MYSQLI_SET_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>SET</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-num-flag">
<span class="term"><strong><code>MYSQLI_NUM_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>NUMERIC</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-part-key-flag">
<span class="term"><strong><code>MYSQLI_PART_KEY_FLAG</code></strong></span>
<dd>
<p class="para">
Field is part of an multi-index
</p>
</dd>
</dt>
<dt id="constantmysqli-group-flag">
<span class="term"><strong><code>MYSQLI_GROUP_FLAG</code></strong></span>
<dd>
<p class="para">
Field is part of <em>GROUP BY</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-decimal">
<span class="term"><strong><code>MYSQLI_TYPE_DECIMAL</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DECIMAL</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-newdecimal">
<span class="term"><strong><code>MYSQLI_TYPE_NEWDECIMAL</code></strong></span>
<dd>
<p class="para">
Precision math <em>DECIMAL</em> or <em>NUMERIC</em> field (MySQL 5.0.3 and up)
</p>
</dd>
</dt>
<dt id="constantmysqli-type-bit">
<span class="term"><strong><code>MYSQLI_TYPE_BIT</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>BIT</em> (MySQL 5.0.3 and up)
</p>
</dd>
</dt>
<dt id="constantmysqli-type-tiny">
<span class="term"><strong><code>MYSQLI_TYPE_TINY</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TINYINT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-short">
<span class="term"><strong><code>MYSQLI_TYPE_SHORT</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>SMALLINT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-long">
<span class="term"><strong><code>MYSQLI_TYPE_LONG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>INT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-fload">
<span class="term"><strong><code>MYSQLI_TYPE_FLOAT</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>FLOAT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-double">
<span class="term"><strong><code>MYSQLI_TYPE_DOUBLE</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DOUBLE</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-null">
<span class="term"><strong><code>MYSQLI_TYPE_NULL</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DEFAULT NULL</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-timestamp">
<span class="term"><strong><code>MYSQLI_TYPE_TIMESTAMP</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TIMESTAMP</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-longlong">
<span class="term"><strong><code>MYSQLI_TYPE_LONGLONG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>BIGINT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-int24">
<span class="term"><strong><code>MYSQLI_TYPE_INT24</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>MEDIUMINT</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-date">
<span class="term"><strong><code>MYSQLI_TYPE_DATE</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DATE</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-time">
<span class="term"><strong><code>MYSQLI_TYPE_TIME</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TIME</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-datetime">
<span class="term"><strong><code>MYSQLI_TYPE_DATETIME</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DATETIME</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-year">
<span class="term"><strong><code>MYSQLI_TYPE_YEAR</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>YEAR</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-newdate">
<span class="term"><strong><code>MYSQLI_TYPE_NEWDATE</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>DATE</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-interval">
<span class="term"><strong><code>MYSQLI_TYPE_INTERVAL</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>INTERVAL</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-enum">
<span class="term"><strong><code>MYSQLI_TYPE_ENUM</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>ENUM</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-set">
<span class="term"><strong><code>MYSQLI_TYPE_SET</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>SET</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-tiny-blob">
<span class="term"><strong><code>MYSQLI_TYPE_TINY_BLOB</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TINYBLOB</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-medium-blob">
<span class="term"><strong><code>MYSQLI_TYPE_MEDIUM_BLOB</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>MEDIUMBLOB</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-long-blob">
<span class="term"><strong><code>MYSQLI_TYPE_LONG_BLOB</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>LONGBLOB</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-blob">
<span class="term"><strong><code>MYSQLI_TYPE_BLOB</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>BLOB</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-var-string">
<span class="term"><strong><code>MYSQLI_TYPE_VAR_STRING</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>VARCHAR</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-string">
<span class="term"><strong><code>MYSQLI_TYPE_STRING</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>CHAR</em> or <em>BINARY</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-char">
<span class="term"><strong><code>MYSQLI_TYPE_CHAR</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>TINYINT</em>.
For <em>CHAR</em>, see <em>MYSQLI_TYPE_STRING</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-type-geometry">
<span class="term"><strong><code>MYSQLI_TYPE_GEOMETRY</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>GEOMETRY</em>
</p>
</dd>
</dt>
<dt id="constantmysqli-need-data">
<span class="term"><strong><code>MYSQLI_NEED_DATA</code></strong></span>
<dd>
<p class="para">
More data available for bind variable
</p>
</dd>
</dt>
<dt id="constantmysqli-no-data">
<span class="term"><strong><code>MYSQLI_NO_DATA</code></strong></span>
<dd>
<p class="para">
No more data available for bind variable
</p>
</dd>
</dt>
<dt id="constantmysqli-data-truncated">
<span class="term"><strong><code>MYSQLI_DATA_TRUNCATED</code></strong></span>
<dd>
<p class="para">
Data truncation occurred. Available since PHP 5.1.0 and MySQL 5.0.5.
</p>
</dd>
</dt>
<dt id="constantmysqli-enum-flag">
<span class="term"><strong><code>MYSQLI_ENUM_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>ENUM</em>. Available since PHP 5.3.0.
</p>
</dd>
</dt>
<dt id="constantmysqli-binary-flag">
<span class="term"><strong><code>MYSQLI_BINARY_FLAG</code></strong></span>
<dd>
<p class="para">
Field is defined as <em>BINARY</em>. Available since PHP 5.3.0.
</p>
</dd>
</dt>
<dt id="constantmysqli-cursor-type-for-update">
<span class="term"><strong><code>MYSQLI_CURSOR_TYPE_FOR_UPDATE</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-cursor-type-no-cursor">
<span class="term"><strong><code>MYSQLI_CURSOR_TYPE_NO_CURSOR</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-cursor-type-read-only">
<span class="term"><strong><code>MYSQLI_CURSOR_TYPE_READ_ONLY</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-cursor-type-scrollable">
<span class="term"><strong><code>MYSQLI_CURSOR_TYPE_SCROLLABLE</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-stmt-attr-cursor-type">
<span class="term"><strong><code>MYSQLI_STMT_ATTR_CURSOR_TYPE</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-stmt-attr-prefetch-rows">
<span class="term"><strong><code>MYSQLI_STMT_ATTR_PREFETCH_ROWS</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-stmt-attr-update-max-length">
<span class="term"><strong><code>MYSQLI_STMT_ATTR_UPDATE_MAX_LENGTH</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-set-charset-name">
<span class="term"><strong><code>MYSQLI_SET_CHARSET_NAME</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-report-index">
<span class="term"><strong><code>MYSQLI_REPORT_INDEX</code></strong></span>
<dd>
<p class="para">
Report if no index or bad index was used in a query.
</p>
</dd>
</dt>
<dt id="constantmysqli-report-error">
<span class="term"><strong><code>MYSQLI_REPORT_ERROR</code></strong></span>
<dd>
<p class="para">
Report errors from mysqli function calls.
</p>
</dd>
</dt>
<dt id="constantmysqli-report-strict">
<span class="term"><strong><code>MYSQLI_REPORT_STRICT</code></strong></span>
<dd>
<p class="para">
Throw a <em>mysqli_sql_exception</em> for errors instead of warnings.
</p>
</dd>
</dt>
<dt id="constantmysqli-report-all">
<span class="term"><strong><code>MYSQLI_REPORT_ALL</code></strong></span>
<dd>
<p class="para">
Set all options on (report all).
</p>
</dd>
</dt>
<dt id="constantmysqli-report-off">
<span class="term"><strong><code>MYSQLI_REPORT_OFF</code></strong></span>
<dd>
<p class="para">
Turns reporting off.
</p>
</dd>
</dt>
<dt id="constantmysqli-debug-trace-enabled">
<span class="term"><strong><code>MYSQLI_DEBUG_TRACE_ENABLED</code></strong></span>
<dd>
<p class="para">
Is set to 1 if <span class="function"><a href="mysqli.debug.html" class="function">mysqli_debug()</a></span> functionality is enabled.
</p>
</dd>
</dt>
<dt id="constantmysqli-server-query-no-good-index-used">
<span class="term"><strong><code>MYSQLI_SERVER_QUERY_NO_GOOD_INDEX_USED</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-server-query-no-index-used">
<span class="term"><strong><code>MYSQLI_SERVER_QUERY_NO_INDEX_USED</code></strong></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-grant">
<span class="term"><strong><code>MYSQLI_REFRESH_GRANT</code></strong></span>
<dd>
<p class="para">
Refreshes the grant tables.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-log">
<span class="term"><strong><code>MYSQLI_REFRESH_LOG</code></strong></span>
<dd>
<p class="para">
Flushes the logs, like executing the
<em>FLUSH LOGS</em> <acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-tables">
<span class="term"><strong><code>MYSQLI_REFRESH_TABLES</code></strong></span>
<dd>
<p class="para">
Flushes the table cache, like executing the
<em>FLUSH TABLES</em> <acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-hosts">
<span class="term"><strong><code>MYSQLI_REFRESH_HOSTS</code></strong></span>
<dd>
<p class="para">
Flushes the host cache, like executing the
<em>FLUSH HOSTS</em> <acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-status">
<span class="term"><strong><code>MYSQLI_REFRESH_STATUS</code></strong></span>
<dd>
<p class="para">
Reset the status variables, like executing the
<em>FLUSH STATUS</em> <acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-threads">
<span class="term"><strong><code>MYSQLI_REFRESH_THREADS</code></strong></span>
<dd>
<p class="para">
Flushes the thread cache.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-slave">
<span class="term"><strong><code>MYSQLI_REFRESH_SLAVE</code></strong></span>
<dd>
<p class="para">
On a slave replication server: resets the master server information, and
restarts the slave. Like executing the <em>RESET SLAVE</em>
<acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-refresh-master">
<span class="term"><strong><code>MYSQLI_REFRESH_MASTER</code></strong></span>
<dd>
<p class="para">
On a master replication server: removes the binary log files listed in the
binary log index, and truncates the index file. Like executing the
<em>RESET MASTER</em> <acronym>SQL</acronym> statement.
</p>
</dd>
</dt>
<dt id="constantmysqli-trans-cor-and-chain">
<span class="term"><strong><code>MYSQLI_TRANS_COR_AND_CHAIN</code></strong></span>
<dd>
<p class="para">
Appends "AND CHAIN" to <span class="function"><a href="mysqli.commit.html" class="function">mysqli_commit()</a></span> or
<span class="function"><a href="mysqli.rollback.html" class="function">mysqli_rollback()</a></span>.
</p>
</dd>
</dt>
<dt id="constantmysqli-trans-cor-and-no-chain">
<span class="term"><strong><code>MYSQLI_TRANS_COR_AND_NO_CHAIN</code></strong></span>
<dd>
<p class="para">
Appends "AND NO CHAIN" to <span class="function"><a href="mysqli.commit.html" class="function">mysqli_commit()</a></span> or
<span class="function"><a href="mysqli.rollback.html" class="function">mysqli_rollback()</a></span>.
</p>
</dd>
</dt>
<dt id="constantmysqli-trans-cor-release">
<span class="term"><strong><code>MYSQLI_TRANS_COR_RELEASE</code></strong></span>
<dd>
<p class="para">
Appends "RELEASE" to <span class="function"><a href="mysqli.commit.html" class="function">mysqli_commit()</a></span> or
<span class="function"><a href="mysqli.rollback.html" class="function">mysqli_rollback()</a></span>.
</p>
</dd>
</dt>
<dt id="constantmysqli-trans-cor-no-release">
<span class="term"><strong><code>MYSQLI_TRANS_COR_NO_RELEASE</code></strong></span>
<dd>
<p class="para">
Appends "NO RELEASE" to <span class="function"><a href="mysqli.commit.html" class="function">mysqli_commit()</a></span> or
<span class="function"><a href="mysqli.rollback.html" class="function">mysqli_rollback()</a></span>.
</p>
</dd>
</dt>
</dl>
</div>
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