PHP how to quote string array values - php

Question

If I have the following array $array[0] = array(
"1" => bar,
"2" => foo,
"3" => 13546
); and I implode() it, the value that is returned will be: bar,foo,13546 which cannot be used in a mysql query... How can I place single quotes just to those values that are strings...
I've tryed a couple of ways (like foreach($array as $key=>$value) to check with is_numeric() the $value, and the check is ok but I dont know how to change the value to '$value'...)
Any toughts on this?
EDIT
I found another way to do this for those of you who are interested:
$result[0] = array(
"1" => bar,
"2" => foo,
"3" => 1232.13
);
$copy_r = $result[0];
foreach($copy_r as $key=>$value)
{
if(!is_numeric($value))
{
$insert_array[] = "`$key` = '$value'";
}
else
{
$insert_array[] = "`$key` = $value";
}
}
$final_string = implode(',', $insert_array);
$insert_q = "INSERT INTO `table_name` SET $final_string
ON DUPLICATE KEY UPDATE ($final_string)";

Answer 1

Agree that you should look at prepared statements, however to answer your original question you can do that like this:
$array=array('a', 'b', 'c');
$string = "'" . implode("','", $array) . "'";

Answer 2

Better use prepared queries. But just for funs sake:
implode(',', array_map(function($value) {
if(!is_numeric($value)) {
return '"' . $value . '"';
//adds double quotes, but if you prefer single quotes, use:
//return "'" . $value . "'";
} else {
return $value;
}
}, $array[0]);

Answer 3

The foreach+isnumeric() is probably the best approach. Then to change the value:
$array[$key] = "'" . $value . "'";
which turns foo/"foo" into 'foo'/"'foo'" and so on.

Answer 4

If you use the mysql-driver:
function escape( $x ) {
return "'" . mysql_real_escape_string($x) . "'";
}
$data = array( "1" => bar, "2" => foo, "3" => 13546 );
echo implode( ',', array_map('escape', $data) );

Answer 5

The verified solution didn't work for me. Must be something that i'm doing incorrectly, but the below solution worked for me and i used the result in my MYSQL IN clause since all the values needs to be in quoted form in that query.
The solution is simple and it uses call by reference to modify the original array values and array filter of PHP to loop through all the values.
function quote(&$a){
$a='"'.$a.'"';
}
$arr= array('car','bus','truck','bike');
array_filter( $arr,'quote');
echo implode(',', $arr);