php 内爆 (101) 带引号

Question

Imploding a simple array

would look like this

$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);

and that would return this

 lastname,email,phone

great, so i might do this instead

$array = array('lastname', 'email', 'phone');
$comma_separated = implode("','", $array);
$comma_separated = "'".$comma_separated."'";

and now i have what I want a nice pretty csv string

 'lastname','email','phone'

is there a better way to do this, it feels to me like there should be an optional parameter for implode am I missing something?

Answer 1

$array = array('lastname', 'email', 'phone');


echo "'" . implode("','", $array) . "'";

Answer 2

You could use array_map() :

function add_quotes($str) {
    return sprintf("'%s'", $str);
}

$csv =  implode(',', array_map('add_quotes', $array));

DEMO

Also note that there is fputcsv if you want to write to a file.

Answer 3

$ids = sprintf("'%s'", implode("','", $ids ) );

Answer 4

No, the way that you're doing it is just fine. implode() only takes 1-2 parameters (if you just supply an array, it joins the pieces by an empty string).

Answer 5

Don't know if it's quicker, but, you could save a line of code with your method:

From

$array = array('lastname', 'email', 'phone');
$comma_separated = implode("','", $array);
$comma_separated = "'".$comma_separated."'";

To:

$array = array('lastname', 'email', 'phone');
$comma_separated = "'".implode("','", $array)."'";

Answer 6

If you want to use loops you can also do:

$array = array('lastname', 'email', 'phone');
foreach($array as &$value){
   $value = "'$value'";
}
$comma_separated = implode(",", $array);

Demo: http://codepad.org/O2kB4fRo

Answer 7

$id = array(2222,3333,4444,5555,6666);
$ids = "'".implode("','",$id)."'";

Or

$ids = sprintf("'%s'", implode("','", $id ) );

Answer 8

Alternatively you can create such a function:

function implode_with_quotes(array $data)
{
    return sprintf("'%s'", implode("', '", $data));
}

Answer 9

If you want to avoid the fopen/fputcsv sub-systems here's a snippet that builds an escaped CSV string from an associative array....

$output = '';
foreach ($list as $row) {
  $output .= '"' . implode('", "', array_values($row)) . '"' . "\r\n";
}

Or from a list of objects...

foreach ($list as $obj) {
  $output .= '"' . implode('", "', array_values((array) $obj)) . '"' . "\r\n";
}

Then you can output the string as desired.

Answer 10

I think this is what you are trying to do

$array = array('lastname', 'email', 'phone');
echo "'" . implode("','", explode(',', $array)) . "'";

Answer 11

Another possible option, depending on what you need the array for:

$array = array('lastname', 'email', 'phone');
echo json_encode($array);

This will put '[' and ']' around the string, which you may or may not want.

Answer 12

you can do it this way also

<?php
$csv= '\'' . join(array('lastname', 'email', 'phone'),'\',').'\'';
echo $csv;
?>

Answer 13

Don't forget to escape your data! If you want to put data in a CSV file without fputcsv function or put it in a SQL query use this code:

$comma_separated = "'" . implode("','", array_map('addslashes', $array)) . "'";

This code avoids SQL injection or data fragmentation when input array contains single quotation or backslash characters.

Answer 14

If you need to keep the double quotes (maybe to format a json?) you could also:

$array = ["a", "b", "c"];
implode("\",\"", $array) // "a","b","c"

Answer 15

Another solution is achieved using implode + preg_replace as follows:

$a = ['A', 'B', 'C'];
implode(',', preg_replace('/^(.*)$/', '"$1"', $a)); // "A","B","C"
$b = [];
implode(',', preg_replace('/^(.*)$/', '"$1"', $b)); // empty string

As you can see this also saves you from checking if the array is empty.