Similar word sorting in php [closed] - php

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$MainArr = array("S / White", "S / Red", "S / Black", "M / White", "M / Red", "M / Black", "L / White", "L / Red", "L / Black");
I have this array that should be similar words sorted accordingly
$arr = array("Red", "Black");
You can see that the output is coming according to its similar words
$outputarr = array("S / Red", "M / Red", "L / Red", "S / Black", "M / Black", "L / Black", "S / White", "M / White", "L / White");
What do I have to do about this?
<?php
$MainArr = array("S / White", "S / Red", "S / Black", "M / White", "M / Red", "M / Black", "L / White", "L / Red", "L / Black");
$arr = array("Red", "Black");
$sortArr = [];
foreach ($arr as $value) {
foreach ($MainArr as $main) {
if (strpos($main, $value) !== false) {
$sortArr[] = $main;
}
}
}
$difArr = array_udiff($MainArr, $sortArr, "strcasecmp");
$outputArr = array_merge($sortArr, $difArr);
echo "<pre>";
print_r($outputArr);
echo "</pre>";
exit;
?>
There is another way than that?

Answer 1

try this:
<?php
$MainArr = ["S / White", "S / Red", "S / Black", "M / White", "M / Red", "M / Black", "L / White", "L / Red", "L / Black"];
$arr = ["Red", "Black"];
$outputArr = [];
foreach ($arr as $color) {
$outputArr = array_merge($outputArr, array_filter($MainArr, function($item) use ($color) {
return strpos($item, $color) !== false;
}));
}
$outputArr = array_merge($outputArr, array_diff($MainArr, $outputArr));
echo "<pre>";
print_r($outputArr);
echo "</pre>";
?>
The final $outputArr is generated similarly to the OP solution but as a one-liner.However, the elements that contain the values in $arr could have been filtered without the need of the nested loop. Firstly, $MainArr items are filtered using the array_filter in a foreach loop.
It returns a new array with the elements for which the callback funtion returns true.
use keyword passes $color variable into anonymous callback function scope.
The strpos($item, $color) !== false; condition checks if the current color is found in item.
If $color was found in the $item, the filtered items are added to the $outputArr array.