I have tried for a long time but couldn't find a way to merge an array in to a new one.
Mostly I get lost in looping and matching.;(
I would like to recieve a php 5 method that can do the following:
Example 1
Lets say there is an array with url's like:
Array(
'a',
'a/b/c',
'a/b/c/d/e',
'a/y',
'b/z',
'b/z/q/',
)
Every last folder of the url's is the folder where a user has the right to view.
I would like to send the array to a method that returns a new array like:
Array[](
'a/c/e'
'a/y'
'z/q'
)
The method has combined some elements of the origninal array into one element.
This because there is a match in allowed ending folders.
Example 2
Array(
'projects/projectA/books'
'projects/projectA/books/cooking/book1'
'projects/projectA/walls/wall'
'projects/projectX/walls/wall'
'projects/projectZ/'
'projects/projectZ/Wood/Cheese/Bacon'
)
I would like to get a an array like:
Array[](
'books/book1'
'wall'
'wall'
'projectZ/Bacon'
)
Then it would be great (specialy in case of the 'wall' values) to have some references to the full path's of the original array.
Do it like below:-
<?php
$array = Array(
'projects/projectA/books',
'projects/projectA/books/cooking/book1',
'projects/projectA/walls/wall',
'projects/projectX/walls/wall',
'projects/projectZ/',
'projects/projectZ/Wood/Cheese/Bacon'
);// original array
$final_array =array(); // new array variable
foreach($array as $key=>$arr){ // iterate over original array
$exploded_string = end(array_filter(explode('/',$arr))); // get last-value from the url string
foreach($array as $ar){ // iterate again the original array to compare this string withh each array element
$new_exploded_string = end(array_filter(explode('/',$ar))); // get the new-last-values from url string again
if($arr !== $ar && strpos($ar,$exploded_string) !==false){ // if both old and new url strings are not equal and old-last-value find into url string
if($exploded_string == $new_exploded_string ){ // if both new-last-value and old-last-value are equal
$final_array[] = $exploded_string;
}else{
$final_array[] = $exploded_string.'/'.$new_exploded_string ;
}
}
}
}
print_r($final_array);
Output:-https://eval.in/846738
Well, there isn't a single built-in function for this ;)
$items = array(
'projects/projectA/books',
'projects/projectA/books/cooking/book1',
'projects/projectA/walls/wall',
'projects/projectX/walls/wall',
'projects/projectZ/',
'projects/projectZ/Wood/Cheese/Bacon',
'hold/mold/gold/sold/fold',
'hold/mold/gold',
'raja/maza/saza',
'raja/maza',
'mohit/yenky/client/project',
);
echo '$items = ' . nl2br(htmlspecialchars(print_r($items, true))); //Debug
// Sort, so the shorter basePath comes before the longer subPath
usort($items, function($a, $b) {
if (strlen($a) == strlen($b)) {
return 0;
} else {
return strlen($a) > strlen($b) ? 1 : -1;
}
});
$result = array();
while($basePath = array_shift($items)) { // As long as there is a next item
$basePath = rtrim($basePath, '/'); // Right trim extra /
foreach($items as $idx => $subPath) {
if (strpos($subPath, $basePath . '/') === 0) {
// $subPath begins with $basePath
$result[] = preg_replace('#.*/#', '', $basePath) . '/' . preg_replace('#.*/#', '', rtrim($subPath, '/'));
unset($items[$idx]); // Remove item from array, so it won't be matched again
continue 2; // Continue with next while($basePath = array_shift($items))
}
}
// No subPath found, otherwise continue would have called (skipping below code)
$result[] = preg_replace('#.*/#', '', $basePath);
}
echo '$result = ' . nl2br(htmlspecialchars(print_r($result, true))); //Debug
PHPFiddle: http://phpfiddle.org/main/code/ugq9-hy0i
You can avoid using nested loops (and, actually, you should avoid):
sort($array);
$carry = array_shift($array);
$result = [];
$i = 0;
$lastItem = array_reduce($array, function ($carry, $item) use (&$result, &$i) {
$result[$i] = isset($result[$i])
? array_merge($result[$i], [basename($carry)])
: [basename($carry)];
if (strpos($item, $carry) !== 0) {
$i += 1;
}
return $item;
}, $carry);
if (!empty($lastItem)) {
$result[$i] = isset($result[$i])
? array_merge($result[$i], [basename($lastItem)])
: [basename($lastItem)];
}
$result = array_map(function ($item) {
return implode('/', $item);
}, $result);
Here is working demo.
We use array_reduce here to get access to the previously processed item. Also, PHP has function basename, that retrieves the basename. So you can use it and do not reinvent the wheel.
