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<?php |
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namespace voku\db; |
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/** |
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* Helper: this handles extra functions that use the "DB"-Class |
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* |
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* @package voku\db |
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*/ |
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class Helper |
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{ |
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/** |
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* Check if "mysqlnd"-driver is used. |
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* |
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* @return bool |
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*/ |
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public static function isMysqlndIsUsed() |
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{ |
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static $_mysqlnd_is_used = null; |
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if ($_mysqlnd_is_used === null) { |
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$_mysqlnd_is_used = (extension_loaded('mysqlnd') && function_exists('mysqli_fetch_all')); |
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} |
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return $_mysqlnd_is_used; |
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} |
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/** |
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* return all db-fields from a table |
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* |
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* @param string $table |
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* @param bool $useStaticCache |
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* @param DB|null $db |
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* |
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* @return array |
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*/ |
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public static function getDbFields($table, $useStaticCache = true, DB $db = null) |
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{ |
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static $dbFieldsCache = array(); |
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// use the cache |
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if ( |
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$useStaticCache === true |
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&& |
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isset($dbFieldsCache[$table]) |
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) { |
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return $dbFieldsCache[$table]; |
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} |
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// init |
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$dbFields = array(); |
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if ($db === null) { |
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$db = DB::getInstance(); |
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} |
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$sql = 'SHOW COLUMNS FROM `' . $db->escape($table) . '`'; |
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$result = $db->query($sql); |
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if ($result && $result->num_rows > 0) { |
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foreach ($result->fetchAllArray() as $tmpResult) { |
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$dbFields[] = $tmpResult['Field']; |
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} |
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} |
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// add to static cache |
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$dbFieldsCache[$table] = $dbFields; |
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return $dbFields; |
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} |
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/** |
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* copy row within a DB table and making updates to columns |
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* |
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* @param string $table |
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* @param array $whereArray |
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* @param array $updateArray |
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* @param array $ignoreArray |
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* @param DB|null $db |
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* |
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* @return bool|int "int" (insert_id) by "<b>INSERT / REPLACE</b>"-queries<br /> |
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* "false" on error |
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*/ |
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public static function copyTableRow($table, array $whereArray, array $updateArray = array(), array $ignoreArray = array(), DB $db = null) |
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{ |
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// init |
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$whereSQL = ''; |
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$return = false; |
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if ($db === null) { |
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$db = DB::getInstance(); |
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} |
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$table = $db->escape($table); |
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foreach ($whereArray as $key => $value) { |
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$whereSQL = ' AND ' . $db->escape($key) . ' = ' . $db->escape($value); |
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} |
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// get the row |
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$query = 'SELECT * FROM ' . $table . ' |
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WHERE 1 = 1 |
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' . $whereSQL . ' |
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'; |
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$result = $db->query($query); |
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// make sure the row exists |
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if ($result->num_rows > 0) { |
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foreach ($result->fetchAllArray() as $tmpArray) { |
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// re-build a new DB query and ignore some field-names |
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$bindings = array(); |
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$insert_keys = ''; |
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$insert_values = ''; |
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foreach ($tmpArray as $fieldName => $value) { |
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if (!in_array($fieldName, $ignoreArray, true)) { |
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if (array_key_exists($fieldName, $updateArray)) { |
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if ($updateArray[$fieldName] || $updateArray[$fieldName] == 0) { |
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$insert_keys .= ',' . $fieldName; |
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$insert_values .= ',?'; |
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$bindings[] = $updateArray[$fieldName]; |
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} |
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} else { |
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$insert_keys .= ',' . $fieldName; |
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$insert_values .= ',?'; |
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$bindings[] = $value; |
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} |
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} |
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} |
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// insert the "copied" row |
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$new_query = 'INSERT INTO `' . $table . '` (' . ltrim($insert_keys, ',') . ') |
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VALUES (' . ltrim($insert_values, ',') . ') |
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'; |
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$return = $db->query($new_query, $bindings); |
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} |
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} |
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return $return; |
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} |
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} |
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voku /
simple-mysqli
