Can't execute multi-statement SQL through PHP code [duplicate] - php

Question

This question already has answers here:
How to execute two mysql queries as one in PHP/MYSQL?
(8 answers)
Closed 8 years ago.
The SQL code used below works just fine if pasted in PHPMyAdmin.
But once I use it in custom PHP code it throws an exception:
You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'CREATE TABLE v2_session ( username varchar(150) DEFAULT '', time
varchar(1' at line 2
What am I missing, the code is dead simple, I am so confused right now.
This is my PHP code:
$con=mysqli_connect("host","user","password","db");
if (mysqli_connect_errno()) {
echo "Error: " . mysqli_connect_error();
}
$sql="
DROP TABLE IF EXISTS v2_session;
CREATE TABLE v2_session (
username varchar(150) DEFAULT '',
time varchar(14) DEFAULT '',
session_id varchar(200) NOT NULL DEFAULT '0',
guest tinyint(4) DEFAULT '1',
userid int(11) DEFAULT '0',
usertype varchar(50) DEFAULT '',
gid tinyint(3) unsigned NOT NULL DEFAULT '0',
client_id tinyint(3) unsigned NOT NULL DEFAULT '0',
data longtext,
PRIMARY KEY (session_id(64)),
KEY whosonline (guest,usertype),
KEY userid (userid),
KEY time (time)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;";
if (mysqli_query($con,$sql)) {
echo 'Success!';
} else {
echo "Error: " . mysqli_error($con);
}
mysqli_close($con);

Answer 1

mysqli_query does not allow for multiple statements concatenated by a semicolon.
Either split the query up into two separate queries, or use mysqli_multi_query() with a very similar syntax instead.
bool mysqli_multi_query ( mysqli $link , string $query )
Executes one or multiple queries which are concatenated by a semicolon.
The downside with mysqli_multi_query is that it makes your code more sensitive to SQL injection (since a whole statement can be injected), but for static queries without parameters it should not cause any problems.

Answer 2

These are two statements, and should be executed separately:
$sql = "DROP TABLE IF EXISTS v2_session";
if (!mysqli_query($con,$sql)) {
echo "Error: " . mysqli_error($con);
exit(1);
}
$sql="
CREATE TABLE v2_session (
username varchar(150) DEFAULT '',
time varchar(14) DEFAULT '',
session_id varchar(200) NOT NULL DEFAULT '0',
guest tinyint(4) DEFAULT '1',
userid int(11) DEFAULT '0',
usertype varchar(50) DEFAULT '',
gid tinyint(3) unsigned NOT NULL DEFAULT '0',
client_id tinyint(3) unsigned NOT NULL DEFAULT '0',
data longtext,
PRIMARY KEY (session_id(64)),
KEY whosonline (guest,usertype),
KEY userid (userid),
KEY time (time)
) ENGINE=MyISAM DEFAULT CHARSET=utf8";
if (mysqli_query($con,$sql)) {
echo 'Success!';
} else {
echo "Error: " . mysqli_error($con);
}