- addslashes: documentation ( source)
<?php
$name="why";//声明变量$name,并初始化
function echoName1()
{
//在函数echoName1()里使用global来声明$name
global $name;
echo "the first name is ".$name."<br>";
}
function echoName2()
{
//在函数echoName2()里没有使用global来声明$name
echo "the second name is ".$name."<br>";
}
echoName1();
echoName2();
$last_name = "O'Keefe";
echo $sql = "select * from users where last_name = '" . addslashes($last_name) . "'";