Added tableExists

Author: avbdr

MysqliDb.php

@@ -1457,5 +1457,25 @@ private function _traceGetCaller () {
         return __CLASS__ . "->" . $caller["function"] . "() >>  file \"" .
                 str_replace ($this->traceStripPrefix, '', $caller["file"] ) . "\" line #" . $caller["line"] . " " ;
     }
+
+    /**
+     * Method to check if needed table is created
+     *
+     * @param array $tables Table name or an Array of table names to check
+     *
+     * @returns boolean True if table exists
+     */
+    public function tableExists ($tables) {
+        $tables = !is_array ($tables) ? Array ($tables) : $tables;
+        $count = count ($tables);
+        if ($count == 0)
+            return false;
+
+        array_walk ($tables, function (&$value, $key) { $value = self::$prefix . $value; });
+        $this->where ('table_schema', $this->db);
+        $this->where ('table_name', $tables, 'IN');
+        $this->get ('information_schema.tables', $count);
+        return $this->count == $count;
+    }
 } // END class
 ?>

readme.md

@@ -525,19 +525,24 @@ if($db->has("users")) {
 }
 ``` 
 ### Helper commands
-Reconnect in case mysql connection died
+Reconnect in case mysql connection died:
 ```php
 if (!$db->ping())
     $db->connect()
 ```
 
-Get last executed SQL query.
+Get last executed SQL query:
 Please note that function returns SQL query only for debugging purposes as its execution most likely will fail due missing quotes around char variables.
 ```php
     $db->get('users');
     echo "Last executed query was ". $db->getLastQuery();
 ```
 
+Check if table exists:
+```php
+    if ($db->tableExists ('users'))
+        echo "hooray";
+```
 ### Transaction helpers
 Please keep in mind that transactions are working on innoDB tables.
 Rollback transaction if insert fails: