php中mysql查询用变量替换怎么弄
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$names = '"张三','李四','王五'";
$sql = "select * form t where name in ($names)";
$ar = array("张三', '李四', '王五');
$names = join("'", $a);
$sql = "select * form t where name in ('$names')";
$sql = "select * form t where name in ($names)";
$ar = array("张三', '李四', '王五');
$names = join("'", $a);
$sql = "select * form t where name in ('$names')";
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