php array echo out values that contains p1 - php

Question

hi i have an array of about 20/30 items big.
i need to have it loop threw the array and echo out only the items with the text p1 in them.
the array looks like so
"lolly","lollyp1","top","topp1","bum","bump1","gee","geep1"
and so on
i have tried to use something like this
foreach ($arr as $value) {
$needle = htmlspecialchars($_GET["usr"]);
$ret = array_keys(array_filter($arr, function($var) use ($needle){
return strpos($var, $needle) !== false;
}));
but all this gives me is a blank page or 1s
how can i have it echo out the items with p1 in them ?

Answer 1

Try This:
$needle = htmlspecialchars($_GET["usr"]);
$rtnArray = array();
foreach ($arr as $value) {
$rtnArray = strpos($value,$needle);
};
return $rtnArray;
If your trying to write directly to the page the lose the $rtnarray and echo:
$needle = htmlspecialchars($_GET["usr"]);
foreach ($arr as $value) {
echo strpos($value,$needle);
};
To only show ones with 'p1' then filter:
$needle = htmlspecialchars($_GET["usr"]);
foreach ($arr as $value) {
$temp = strpos($value,$needle);
if($temp > 1){
echo $value;
}
};

Answer 2

Using a direct loop with string-comparison would be a simple way to go here:
$needle = $_GET['usr'];
$matches = array();
foreach ($arr as $key => $value) {
if (strpos($value, $needle) !== false) {
$matches[] = $key;
}
}
The use of array_filter() in your post should work, pending the version of PHP you're using. Try updating to use a separate / defined function:
function find_needle($var) {
global $needle;
return strpos($var, $needle) !== false;
}
$ret = array_keys(array_filter($arr, 'find_needle'));
Codepad Example of the second sample