求帮助这是连上了还是没连上,为毛报错

这是怎么回事
代码:
<?php
$con = mysql_connect("localhost","root","abc");
if ($con){
echo 'success';
}else{
echo 'failure';
}
?>

这是怎么回事
代码:
<?php
$con = mysql_connect("localhost","root","abc");
if ($con){
echo 'success';
}else{
echo 'failure';
}
?>
2017-03-07
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