将变量数据从PHP传递到shell_exec命令

Question

I have a script that clones tables on to uniquely named MySQL databases from a master sql dump file . Each account has their own database, but the table structure is the same for all accounts. My solution was to dump the master database table and then through PHP shell_exec, run the MySQL controller cmd (mysql) to populate the newly created database with default tables.

At Issue: The process works but only when I hard code the accounts unique database name in the master sql dump file.

However, "USE acct_dbID" line inside the master sql file needs to be dynamically set at runtime.

Here is the code:

include('.dbase_credentials'); //constants for connection object

//using PHP built in connection class mysqli
$mysqli = new mysqli(DB_HOST,DB_UNAME,DB_UPWORD,DB_NAME);
if ($mysqli->connect_errno){
    echo "Failed to open database connection: ".$mysqli->connect_error;
    exit();
}

$dbID=$varNum; //variable, number ID generated earlier in the account setup process

//create database, doesnt return a resultset, no need for object var here
if ($mysqli->query("CREATE DATABASE acct_".$dbID) === TRUE){

    //if dbase was created, clone the tables
    $res = shell_exec('mysql -u dbaseUser --password=`cat /path/to/pass` -e "source /path/to/master_tables.sql" acct_'.$dbID);

    //provide some UI feedback, shell_exec returns null on failure
    if ($res!=null){
        echo "The tables were cloned!";
    }else{
        echo "The cloning process failed!";
    }
}else{
    echo "no database created.";
}

So again, master_tables.sql needs variable data passed it at runtime so the "USE acct_dbID" can be specific to each new account.

Any thoughts are appreciated. rwhite35

Answer 1

knittl had the right direction for what I need to do. See the comment conversation above. Thanks knittl. Here is the new code block using multi_query and file_get_contents.

if ($mysqli->query("CREATE DATABASE acct_".$dbID) === TRUE){
$acct="acct_".$dbID;
$query = "USE ".$acct.";";
$query .= file_get_contents('/path/to/master_table.sql');
$result=$mysqli->multi_query($query);           
}

Now account can be variable and multi_query will run each query statement in the string. I probably lose some efficiency but gain the ability to clone tables for each new account. The only additional edit made was to the master_table.sql. I removed all the comments that the dump process adds. Thanks, rwhite35