Skip to content

Instantly share code, notes, and snippets.

@msegu msegu/inArray.php
Created Jul 18, 2018

Embed
What would you like to do?
php in_array() extension
You can use function inArray below, to search:
- multidimensional arrays
- for substrings (case [in]sensitive)
- for sub-arrays
- get array of keys of found values
<?php
/** Function 'inArray' checks if a value exists in an array (also multidimensional): if string as substring (case-[in]sensitive), or other value as a element of the same type
*
* @param mixed $needle Value to find (string: as (sub)string, array: as (sub)array, other: as exact element)
* @param array $haystack The array for search (can be multidimensional)
* @param bool $also_similar (optional, default: false)
* for string $needle - default: false, means case-sensitive,
* 1: case-insensitivity comparision
* 2: case-insensitivity comparision, and also any element of $haystack can be substring of $needle
* for array $needle - default: $needle has to be exact element of $haystack
* 1: array $needle also can have the same values as values of any $haystack element (regardless of order and keys!)
* 2: array $needle values also can be sub-array of any element of $haystack (multidimensional)
* for others - doesn't matter
* @param bool $return_keys (optional, default: false) If true, returns array of keys of found values
* @return bool Whether $needle is found in the array, or keys for found values (first dimension only)
*/
function inArray($needle, $haystack, $also_similar = false, $return_keys = false) {
if (!is_array($haystack)) return false;
if ($needle===$haystack) return true;
if ($also_similar!==false) if ($also_similar<3) {
if (is_array($needle)) {
if (in_array($n=$needle, $h=$haystack, true)) {if ($return_keys) $res[]=$key; else return true;}
elseif ($also_similar>0) {
sort($n);
sort($h);
if (($n===$h) || (in_array($n, $h, true))) {if ($return_keys) $res[]=$key; else return true;}
elseif ($also_similar>1) {
$h = array_intersect($h, $n);
sort($h);
if ($n===$h) {if ($return_keys) $res[]=$key; else return true;}
}
}
}
} else $also_similar-=10;
foreach ($haystack as $key => $value) {
if ($needle===$value) {if ($return_keys) $res[]=$key; else return true;}
elseif ((is_string($needle)) && (is_string($value))) {
if (
(strpos($value, $needle)!==false)
|| ($also_similar==1) && (stripos($value, $needle)!==false)
|| ($also_similar==2) && (stripos($needle, $value)!==false)
) {
if ($return_keys) $res[]=$key; else return true;
}
} elseif (is_array($value)) {
if(is_array($needle)) {
if (in_array($needle, $value, true)) {if ($return_keys) $res[]=$key; else return true;}
elseif ($also_similar>0) {
$n = $needle;
sort($n);
$h = $value;
sort($h);
if (($n===$h) || (in_array($n, $h, true))) {if ($return_keys) $res[]=$key; else return true;}
elseif ($also_similar>1) {
$h = array_intersect($h, $n);
sort($h);
if ($n===$h) {if ($return_keys) $res[]=$key; else return true;}
}
}
}
if (inArray($needle, $value, $also_similar+10, $return_keys)) {if ($return_keys) $res[]=$key; else return true;}
}
}
if (($return_keys)&&(is_array($res))) return $res; else return false;
}
// Examples
$a=array (
1 => 'zero',
0 => 'zero1',
2 =>
array (
'X' => 'AAZery',
'Y' => 'Zero',
'Z' => 1234,
0 =>
array (
1 => 12345,
2 => 'ZEro2',
5 => 'Hello',
),
),
'end' => '123',
)
var_dump(inArray(123,$a)); //bool(false)
var_dump(inArray(1234,$a)); //bool(true)
var_export(inArray(1234,$a,0,TRUE)); //array ( 0 => 2, )
var_dump(inArray("1234",$a)); //bool(false)
var_dump(inArray("23",$a)); //bool(true)
var_export(inArray("23",$a,0,TRUE)); //array ( 0 => 'end', )
var_dump(inArray(12345,$a)); //bool(true)
var_dump(inArray("zer",$a)); //bool(true)
var_export(inArray("zer",$a,0,TRUE)); /* array (
0 => 1,
1 => 0,
) */
var_dump(inArray("Zer",$a)); //bool(true)
var_dump(inArray("ZER",$a)); //bool(false)
var_dump(inArray("ZER",$a,1)); //bool(true)
var_export(inArray("ZER",$a,1,TRUE)); /* array (
0 => 1,
1 => 0,
2 => 2,
) */
var_dump(inArray("ZERo2",$a,1)); //bool(true)
var_dump(inArray("ZERo2",$a)); //bool(false)
var_dump(inArray(array(1=>12345,2=>"ZEro2"),$a)); //bool(false)
var_dump(inArray(array(2=>"ZEro2",1=>12345,"Hello"),$a)); //bool(false)
var_dump(inArray(array(2=>"ZEro2",1=>12345,"Hello"),$a,1)); //bool(true)
var_export(inArray(array(2=>"ZEro2",1=>12345,"Hello"),$a,1,TRUE)); //array ( 0 => 2,)
var_dump(inArray(array(2=>"ZEro2",1=>12345),$a,2)); //bool(true)
var_export(inArray(array(2=>"ZEro2",1=>12345),$a,2,TRUE)); //array ( 0 => 2,)
var_dump(inArray(array(2=>"ZEro2",1=>12345,"Hello"),$a,3)); //bool(false)
?>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.