connect to host in php

December 23, 2011 by: prashanth 10

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This is a simple program to test your connection towards your host.

<?php
//This is a comment. This line is to connect to apache.
if(!mysql_connect("localhost", "root", ""))
{
    //If above statement returns any error then it will enter this control statement
    echo "This is an error".mysql_error();
    //mysql_error() is an inbuilt function which returns the error you have encountered.
}
else
{
    //This will be excuited if mysql_connect doesn't return any error.
    echo "Connected to your host correctly";
}
?>

Explanation:: How to connect to host? So you use these following inbuilt function called mysql_connect().

mysql_connect() generally has 3 parameters. mysql_connect(“YourHostName”,”Username”,”Password”);
If you are using Localhost then
YourHostName = localhost
Username = root
password =    (empty by default)

So, this function becomes as

mysql_connect(“localhost”,”root”,”");

        In depth, mysql_connect() returns a non-zero value on success and on failure returns zero with error. So, if this function fails it satisfies ‘ if ‘ condition. So, it enter if statement(If any error occurs while connecting to the host it will return a zero. and Not of zero is one. So, it enter if statement). As an error is generated it will be displayed in echo statement. mysql_error() returns the error occured while connecting to host. We write echo statement as

error “Occured error is:”.mysql_error();

        You should have observed a dot(.) begin placed after double-quotes( ” ). This is to follow the rules. Else it will return an error. So, you need to follow the format very strictly.

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