Php Errors And Their Meanings

Php Folks,

Is this ok or do you have a better way of writing them ?

[code]
if(mysqli_connect_error())
{
echo “Connection Error!” . mysqli_connect_error();
echo “Connection Error Number!” . mysqli_connect_errno();
}
[/code]

Not sure if I asked you these or opened a thread about them but which do you use and can you rank these 3 so I know your rankings:

[code]
<?php

$link = mysqli_connect(“localhost”, “root”, “test”);

// Check connection
if($link === false){
die(“ERROR: Could not connect. ” . mysqli_connect_error());
}

// Print host information
echo “Connect Successfully. Host info: ” . mysqli_get_host_info($link);

mysqli_close($link);

?>
[/code]

[code]
<?php

mysqli_connect(“localhost”, “root”, “”, “GFG”);

if(mysqli_connect_error())
echo “Connection Error.”;
else
echo “Database Connection Successfully.”;

?>
[/code]

[code]
<?php

$link = mysqli_connect(“127.0.0.1”, “my_user”, “my_password”, “my_db”);

if (!$link) {
echo “Error: Unable to connect to MySQL.” . PHP_EOL;
echo “Debugging errno: ” . mysqli_connect_errno() . PHP_EOL;
echo “Debugging error: ” . mysqli_connect_error() . PHP_EOL;
exit;
}

echo “Success: A proper connection to MySQL was made! The my_db database is great.” . PHP_EOL;
echo “Host information: ” . mysqli_get_host_info($link) . PHP_EOL;

mysqli_close($link);

?>
[/code]

Or, if you have a better code then show me.

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