foreach concatenate each element to next one - php

Question

I would like to concatenate each element of array to next one. I want the output array to be:
Array
(
[0] => test
[1] => test/test2
[2] => test/test2/test3
[3] => test/test2/test3/test4
)
I tried the following way which concatenates each string to itself:
$url = preg_split("/[\s\/]+/", "test/test2/test3/test4");
foreach ($url as $dir) {
$dir .= $dir;
}
Any help appreciated.

Answer 1

Maybe another way
<?php
$data = array( 'test', 'test2', 'test3', 'test4' );
for( $i = 0; $i < count( $data ); $i++ )
{
if( $i != 0 )
{
$new[ $i ] = $new[ $i - 1 ] .'/'. $data[ $i ];
}
else
{
$new[ $i ] = $data[ $i ];
}
}
var_dump( $new );
Output
array(4) {
[0]=>
string(4) "test"
[1]=>
string(10) "test/test2"
[2]=>
string(16) "test/test2/test3"
[3]=>
string(22) "test/test2/test3/test4"
}

Answer 2

You should obtain the result you need in $my_array
$url = explode("/", "test/test2/test3/test4");
$str ='';
foreach($url as $key => $value){
if ( $str == '') {
$str .= $str;
} else {
$str .= '/'.$str;
}
$my_array[$key] = $str ;
echo $str . '<br />';
}
var_dump($my_array);

Answer 3

$url = preg_split("/[\s\/]+/", "test/test2/test3/test4");
$arr = array();
$str = '';
foreach ($url as $key => $dir) {
if ($key !== 0) {
$str .= '/' . $dir;
} else {
$str .= $dir;
}
$arr[] = $str;
}
On each iteration concate a string with new value and add it as a separate value for your output array.

Answer 4

Here's a quick way. For simple splitting just use explode():
$url = explode("/", "test/test2/test3/test4");
foreach($url as $value) {
$temp[] = $value;
$result[] = implode("/", $temp);
}
Each time through the loop, add the current value to a temporary array and implode it into the next element of the result.