Convert php array to formatted string - php

Question

Lets say I have an array like this, it could be multi-dimensional so I do need to make this loop recursive.
I think I'm close but can't quite see where I'm wrong.
[
{ "value": "rigging" },
{ "value": "animation" },
{ "value": "modeling" }
]
function _replace_amp($post = array()) {
foreach($post as $key => $value)
{
if (is_array($value)) {
$b = $this->_replace_amp($value);
} else {
$b .= $value . ', ';
}
}
return $b;
}
The intended result should be:
"rigging, animation, modeling"
I'm getting just "modeling,"

Answer 1

In your code, you need to write
$b .= $this->_replace_amp($value); // note the period
Without the period, you are initiating $b every time your script finds a new array, but you want to append the results to $b.
Other than that, there is a nice implode function for multidimensional arrays available:
/**
* Recursively implodes an array with optional key inclusion
*
* Example of $include_keys output: key, value, key, value, key, value
*
* #access public
* #param array $array multi-dimensional array to recursively implode
* #param string $glue value that glues elements together
* #param bool $include_keys include keys before their values
* #param bool $trim_all trim ALL whitespace from string
* #return string imploded array
*/
function recursive_implode(array $array, $glue = ',', $include_keys = false, $trim_all = true)
{
$glued_string = '';
// Recursively iterates array and adds key/value to glued string
array_walk_recursive($array, function($value, $key) use ($glue, $include_keys, &$glued_string)
{
$include_keys and $glued_string .= $key.$glue;
$glued_string .= $value.$glue;
});
// Removes last $glue from string
strlen($glue) > 0 and $glued_string = substr($glued_string, 0, -strlen($glue));
// Trim ALL whitespace
$trim_all and $glued_string = preg_replace("/(\s)/ixsm", '', $glued_string);
return (string) $glued_string;
}
Source: https://gist.github.com/jimmygle/2564610

Answer 2

I think either json_encode( your_php_array ) or serialize() function is help you.

Answer 3

You want to use function implode(). No need to re-invent the wheel.
<?php
$arr = ['one', 'two', 'three'];
echo implode(',', $arr); // one, two, three

Answer 4

$b = $this->_replace_amp($value); change in this line to $b .= $this->_replace_amp($value);
this answer as per your coding
[
{ "value": "rigging" },
{ "value": "animation" },
{ "value": "modeling" }
]
function _replace_amp($post = array()) {
foreach($post as $key => $value)
{
if (is_array($value)) {
$b .= $this->_replace_amp($value);
} else {
$b .= $value . ', ';
}
}
return $b;
}
batter way to do this using used implode(',',$array);