combine implode() and array_keys() to get a string of key names

[Dave M G]

PHP List,

I've got a series of associative arrays that contain simple string
values that I want to insert into my database.

In each array, the names of the keys correspond to the column names
in the database table. The values stored in the array are, of course,
the values that I want to insert into the columns.

So, I want to set up a function where I can pass the array as an
argument, and it will construct the MySQL statement using the keys for
column names, and array values for insert values.

Within the function, the query looks like this:
$query = "INSERT INTO table (" . $columns . ") VALUES = (" . $values
. ")";

Assuming that the array argument passed to the function is called
$array, converting the array values to the insert values is pretty easy:
$values = implode(", ", $array);

But in the case of using the array keys for column names, it's not
so easy:
$columns = implode(", " array->keys($array));

I know that code above doesn't work, because, as described in the
manual, array keys returns a list of the numerical indexes along with
the string indexes. Something like this:

Array
(
[0] => column1
[1] => column2
[2] => column3
)

At least, that's what it looks like if it's just echoed out.

Is there a way I can strip out the relevant column names to be more
like this:

"column1, column2. column3"

Thank you for any advice.

--
Dave M G

[Jochem Maas]

Post by Dave M G
PHP List,
I've got a series of associative arrays that contain simple string
values that I want to insert into my database.
In each array, the names of the keys correspond to the column names
in the database table. The values stored in the array are, of course,
the values that I want to insert into the columns.
So, I want to set up a function where I can pass the array as an
argument, and it will construct the MySQL statement using the keys for
column names, and array values for insert values.
$query = "INSERT INTO table (" . $columns . ") VALUES = (" . $values
. ")";
Assuming that the array argument passed to the function is called
$values = implode(", ", $array);
But in the case of using the array keys for column names, it's not so
$columns = implode(", " array->keys($array));
I know that code above doesn't work, because, as described in the
manual, array keys returns a list of the numerical indexes along with
Array
(
[0] => column1
[1] => column2
[2] => column3
)
At least, that's what it looks like if it's just echoed out.
Is there a way I can strip out the relevant column names to be more
"column1, column2. column3"
Thank you for any advice.

I'll assume you 'data' array only contains associative keys for simpilicity,
here we go:

function davesMakeValueSafeForDBInsertionFunc($v)
{
if (is_null($arg)) return 'NULL';
if (is_numeric($arg)) return $arg;

return "'".mysql_real_escape_string($arg)."'";
}

function davesFunkyDBElementQuoterFunc($elName)
{
return "`{$elName}`";
}

$data = array(
'col1' => 1,
'col2' => null,
'col3' => "yadda yadda",
);

$columns = join(',', array_map('davesFunkyDBElementQuoterFunc', array_keys($data)));
$values = join(',', array_map('davesMakeValueSafeForDBInsertionFunc', $data));
$query = "INSERT INTO table ($columns) VALUES ($values)";

// tada!

Post by Dave M G
--
Dave M G

[Dimiter Ivanov]

Post by Dave M G
PHP List,
I've got a series of associative arrays that contain simple string
values that I want to insert into my database.
In each array, the names of the keys correspond to the column names
in the database table. The values stored in the array are, of course,
the values that I want to insert into the columns.
So, I want to set up a function where I can pass the array as an
argument, and it will construct the MySQL statement using the keys for
column names, and array values for insert values.
$query = "INSERT INTO table (" . $columns . ") VALUES = (" . $values
. ")";
Assuming that the array argument passed to the function is called
$values = implode(", ", $array);
But in the case of using the array keys for column names, it's not
$columns = implode(", " array->keys($array));
I know that code above doesn't work, because, as described in the
manual, array keys returns a list of the numerical indexes along with
Array
(
[0] => column1
[1] => column2
[2] => column3
)
At least, that's what it looks like if it's just echoed out.
Is there a way I can strip out the relevant column names to be more
"column1, column2. column3"
Thank you for any advice.
--
Dave M G
--
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To unsubscribe, visit: http://www.php.net/unsub.php

Well after calling array_keys you have an array with all the keys.
If you implode it the same way like you get the values from the
original array, you will get what you want.
$values = implode(", ", $array);
$keys = array_keys($array);
$columns = implode(", ",$keys);

[Janet Valade]

Post by Dave M G
PHP List,
I've got a series of associative arrays that contain simple string
values that I want to insert into my database.
In each array, the names of the keys correspond to the column names
in the database table. The values stored in the array are, of course,
the values that I want to insert into the columns.
So, I want to set up a function where I can pass the array as an
argument, and it will construct the MySQL statement using the keys for
column names, and array values for insert values.
$query = "INSERT INTO table (" . $columns . ") VALUES = (" . $values
. ")";
Assuming that the array argument passed to the function is called
$values = implode(", ", $array);
But in the case of using the array keys for column names, it's not so
$columns = implode(", " array->keys($array));
I know that code above doesn't work, because, as described in the
manual, array keys returns a list of the numerical indexes along with
the string indexes.

Actually, it doesn't matter what the indexes are when you use implode.
Implode just puts the values into a string. Here's code that will work.

$field_array = array_keys($fields_form);
$fields = implode(",",$field_array);
$values = implode('","',$fields_form);
$query = "INSERT INTO Table1 ($fields) VALUES (\"$values\")";
$result = mysqli_query($cxn,$query);

$fields_form is an associative array of all the fields to be entered
into the database, with the field names as keys and the field values as
values. This code quotes the values in the $values string in the query,
as needed if the values are strings.

Janet

Post by Dave M G
Array
(
[0] => column1
[1] => column2
[2] => column3
)
At least, that's what it looks like if it's just echoed out.
Is there a way I can strip out the relevant column names to be more
"column1, column2. column3"
Thank you for any advice.
--
Dave M G

[Larry Garfield]

Post by Janet Valade
Actually, it doesn't matter what the indexes are when you use implode.
Implode just puts the values into a string. Here's code that will work.
$field_array = array_keys($fields_form);
$fields = implode(",",$field_array);
$values = implode('","',$fields_form);
$query = "INSERT INTO Table1 ($fields) VALUES (\"$values\")";
$result = mysqli_query($cxn,$query);
$fields_form is an associative array of all the fields to be entered
into the database, with the field names as keys and the field values as
values. This code quotes the values in the $values string in the query,
as needed if the values are strings.

It is slightly more complicated than that, since if the value is numeric and
going into a numeric field, then it's not supposed to be quoted. (MySQL
generally doesn't care, but some other databases may; I'm not certain.)

I'm actually currently in the midst of getting this functionality added to the
Drupal CMS. Feel free to look at the patch I've submitted[1]. It has some
Drupal-isms in it, but for the most part is fairly clear. It also handles
insert, update, and delete, too.

[1] http://drupal.org/node/30334
--
Larry Garfield AIM: LOLG42
***@garfieldtech.com ICQ: 6817012

"If nature has made any one thing less susceptible than all others of
exclusive property, it is the action of the thinking power called an idea,
which an individual may exclusively possess as long as he keeps it to
himself; but the moment it is divulged, it forces itself into the possession
of every one, and the receiver cannot dispossess himself of it." -- Thomas
Jefferson

[Richard Lynch]

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