protected Connection::setPrefix($prefix)
Set the list of prefixes used by this database connection.
array|string $prefix: Either a single prefix, or an array of prefixes, in any of the multiple forms documented in default.settings.php.
protected function setPrefix($prefix) { if (is_array($prefix)) { $this->prefixes = $prefix + array('default' => ''); } else { $this->prefixes = array('default' => $prefix); } // Set up variables for use in prefixTables(). Replace table-specific // prefixes first. $this->prefixSearch = array(); $this->prefixReplace = array(); foreach ($this->prefixes as $key => $val) { if ($key != 'default') { $this->prefixSearch[] = '{' . $key . '}'; $this->prefixReplace[] = $val . $key; } } // Then replace remaining tables with the default prefix. $this->prefixSearch[] = '{'; $this->prefixReplace[] = $this->prefixes['default']; $this->prefixSearch[] = '}'; $this->prefixReplace[] = ''; // Set up a map of prefixed => un-prefixed tables. foreach ($this->prefixes as $table_name => $prefix) { if ($table_name !== 'default') { $this->unprefixedTablesMap[$prefix . $table_name] = $table_name; } } }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Database!Connection.php/function/Connection::setPrefix/8.1.x