how to query all tables mysql at the same time
function searchAllDB($search){
global $mysqli;
$out = "";
$sql = "show tables";
$rs = $mysqli->query($sql);
if($rs->num_rows > 0){
while($r = $rs->fetch_array()){
$table = $r[0];
$out .= $table.";";
$sql_search = "select * from ".$table." where ";
$sql_search_fields = Array();
$sql2 = "SHOW COLUMNS FROM ".$table;
$rs2 = $mysqli->query($sql2);
if($rs2->num_rows > 0){
while($r2 = $rs2->fetch_array()){
$column = $r2[0];
$sql_search_fields[] = $column." like('%".$search."%')";
}
$rs2->close();
}
$sql_search .= implode(" OR ", $sql_search_fields);
$rs3 = $mysqli->query($sql_search);
$out .= $rs3->num_rows."\n";
if($rs3->num_rows > 0){
$rs3->close();
}
}
$rs->close();
}
return $out;
}