MAMP localhost not Responding - php

Question

I am trying to run php file using MAMP on my mac system having maverick operating system.
it was working good before but suddenly it stop responding.
when I run html file it work fine even when I run any .php file with out database PDO it work fine but when I try to run php file with PDO database connection, localhost does work.
any concrete suggestions. welcome !
<?php
try
{
$host ="localhost";
$db ="ijdb";
$user="ijdbuser";
$pwd = "ijdbuser";
$pdo = new PDO('mysql:host=$host; dbname = $db', $user, $pwd);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->exec('SET NAMES "utf8"');
}
catch (PDOException $e)
{
$output = 'Unable to connect to the database server.';
include 'output.html.php';
exit();
}
$output = 'Database connection established.';
include 'output.html.php';

Answer 1

There are a few reasons as to why it's failing.
1) Variables do not get parsed in singles quotes
2) You have spaces; there should not be any.
'mysql:host=$host; dbname = $db'
//^ ^ ^
needs to read as:
"mysql:host=$host;dbname=$db"
^ ^
You may also want to use:
$pdo->exec("SET NAMES utf8");
Nota:
You should also modify your catch{...} to read as:
catch(PDOException $e) {
print $e->getMessage();
}
to get the real reason as to why it's failing.