How to connect to the database?
mysql_connect("localhost",'root') or die('<h1>Error to connect MySQL</h1>'); echo "<p>You connect MySQL</p>"; 
1 answer
Enough to get into the documentation:
http://php.net/manual/ru/function.mysql-connect.php
Warning This extension is deprecated since PHP 5.5.0 and removed in PHP 7.0.0. Use MySQLi or PDO_MySQL instead.
From this we can conclude that your php version is just 7 .
We use mysqli_connect() :
$link = mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db"); if (!$link) { echo "ΠΡΠΈΠ±ΠΊΠ°: ΠΠ΅Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ ΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΡ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠ΅ Ρ MySQL." . PHP_EOL; echo "ΠΠΎΠ΄ ΠΎΡΠΈΠ±ΠΊΠΈ errno: " . mysqli_connect_errno() . PHP_EOL; echo "Π’Π΅ΠΊΡΡ ΠΎΡΠΈΠ±ΠΊΠΈ error: " . mysqli_connect_error() . PHP_EOL; exit; } echo "Π‘ΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠ΅ Ρ MySQL ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ!" . PHP_EOL; echo "ΠΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡ ΠΎ ΡΠ΅ΡΠ²Π΅ΡΠ΅: " . mysqli_get_host_info($link) . PHP_EOL; mysqli_close($link); 
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