为MySQL中的INSERT查询声明php变量

Question

How to declare php variables that will consist the mysql query columns and values properly? The thing is obviously in quotations, I tried several combination witn no success.

This is the query declared in php:

$query = "INSERT INTO table1(pt1, pt2, pt3, pt4, pt5, pt6, pt7, pt8) VALUES ('$q[1]','$q[2]','$q[3]','$q[4]','$q[5]','$q[6]','$q[7]','$q[8]')"; 

This is my wrong variables in php: (two wrong approaches)

$pt_all = pt1, pt2, pt3, pt4, pt5, pt6, pt7, pt8;

for($i=1;$i<9;$i++) {
    $q_all .= '$q[$i]',;
}

This is made in order to place the holder variables into the sql query in php:

$query = "INSERT INTO table1($pt_all) VALUES ($q_all)"; 

And make it easier and shorter. Is there maybe other better technique?

Answer 1

FIrst of all, do not use mysql_* functions , since those are deprecated. Use mysqli_* or PDO. That said, you probably need something like this:

$fields = "pt".join(", pt",array_keys($q)); //pt1, pt2, pt3, ..
$values = "'".join("','",array_values($q))."'"; //values

echo "INSERT INTO ({$fields}) VALUES ({$values})";

Obviously, you will need to adjust this to fit your requirements, but this should give you good sense on array manipulation.

Answer 2

start with an associative array. As an example, I'll use fruit..

$array = array("banana" => "yellow", "apple" => "red", "kiwi" => "green");

Go through and make the strings "banana, apple, kiwi" and "yellow, red, green"

$fields = array();
$values = array();
foreach($array as $key => $val){
    $fields[] = $key;
    $values[] = $val;
}

Now concatenate into a string to be used as SQL

$query = 'INSERT INTO table1("'.implode('", "', $fields).'") ';
$query .= 'VALUES ("'.implode('", "', $values).'");';
echo $query; // "INSERT INTO table1("banana", "apple", "kiwi") VALUES ("yellow", "red", "green");

Hope that's what you're looking for.