action.php

<?php
include("dbcon.php");
$act = "";
$id = 0;
$name = "";
$phone = "";
$birth = "";
$email = "";
if( isset($_POST['act']) ){
	$act = $_POST['act'];
}
if( isset($_POST['id']) ){
	$id = (int)$_POST['id'];
}
if( isset($_POST['name']) ){
	$name = $_POST['name'];
}
if( isset($_POST['phone']) ){
	$phone = $_POST['phone'];
}
if( isset($_POST['birth']) ){
	$birth = $_POST['birth'];
}
if( isset($_POST['email']) ){
	$email = $_POST['email'];
}
$count = 0;
if( $act == "delete" ) {
	if( $id ) {
		$sql = "delete from people where id={$id}";
		$rs = $db->query($sql);
		$count = $rs->rowCount();
	}
} else if( $act == "insert" ) {
	if( $name && $phone && $birth && $email ) {
		$sql = "insert into people set ";
		$sql .= "name='{$name}'";
		$sql .= ", phone='{$phone}'";
		$sql .= ", birth='{$birth}'";
		$sql .= ", email='{$email}'";
		$rs = $db->query($sql);
		$count = $rs->rowCount();
	}
}

echo $count;