array_flip
A function to find intersection of two arrays when comparison is based on only 1 key
function array_common($array1,$array2,$compareString) {
if (!is_array($array1) || !is_array($array2)) {
return false;
}
$arrResult = array();
foreach ($array1 as $arrInsideArray1) {
foreach ($array2 as $arrInsideArray2) {
$found=false;
if ($arrInsideArray1[$compareString]==$arrInsideArray2[$compareString]) {
$found=true;
break;
}
}
if ($found) {
array_push($arrResult,$arrInsideArray1);
}
}
return $arrResult;
}
array_intersect_assoc
(PHP 4 >= 4.3.0, PHP 5)
array_intersect_assoc — Vypočíta prienik polí s dodatočnou kontrolou indexov
Popis
array array_intersect_assoc
( array $pole1
, array $pole2
[, array $ ...
] )
array_intersect_assoc() vracia pole obsahujúce všetky hodnoty v pole1 , ktoré sa vyskytujú vo všetkých argumentoch. Pozor na to, že kľúče sa používajú pri porovnávaní a nie ako v array_intersect().
Example#1 array_intersect_assoc() príklad
<?php
$pole1 = array("a" => "zelena", "b" => "hneda", "c" => "modra", "cervena");
$pole2 = array("a" => "zelena", "zlta", "cervena");
$vysledne_pole = array_intersect_assoc($pole1, $pole2);
?>
$vysledne_pole bude vyzerať následovne:
Array ( [a] => zelena )
V našom príklade vidíte, že iba pár "a" => "zelena" sa vyskytuje v oboch poliach a teda je vrátený. Hodnota "cervena" nie je vrátená, pretože v $pole1 je jeho kľúčom 0 zatiaľčo kľúč hodnoty "cervena" v $pole2 je 1.
Dve hodnoty z párov key => value sa považujú za rovné len vtedy ak (string) $elem1 === (string) $elem2 . Inými slovami, vykoná sa striktná typová kontrola, takže reprezentácia reťazca musí byť rovnaká.
Tiež pozri array_intersect(), array_diff() a array_intersect().
add a note
User Contributed Notesarray_intersect_assoc
asharm4 at ilstu dot edu
20-Apr-2006 09:20
20-Apr-2006 09:20
StR: str at strgt dot cjb dot net
13-Oct-2005 05:34
13-Oct-2005 05:34
To find the keys that are in 2 arrays, without caring of the values:
This is a function i needed, and it also returns the values of the first array
<?php
function array_key_intersect(&$a, &$b) {
$array = array();
while (list($key,$value) = each($a)) {
if (isset($b[$key]))
$array[$key] = $value;
}
return $array;
}
?>
vandor at progressive dot hu
14-Dec-2004 11:26
14-Dec-2004 11:26
# ket tomb kulcs alapu metszetet szamitja ki, az erteken is ellenorzest vegez
#
# calculating (key base) intersection of arrays (value are checked)
# use: $result_array = array_intersect_assoc($a1, $a2, $a3,..);
#
##
# original code by [jochem at iamjochem dawt com] : array_diff_keys()
<?php
function array_intersect_assoc() {
$args = func_get_args();
$res = $args[0];
for ($i=1;$i<count($args);$i++) {
if (!is_array($args[$i])) {continue;}
foreach ($res as $key => $data) {
if ( (!array_key_exists($key, $args[$i])) || ( (isset($args[$i][$key])) && ($args[$i][$key] !== $res[$key]) ) ) {
unset($res[$key]);
}
}
}
return $res;
}
?>
<?php
$array1 = array("a"=>"green", "b"=>"brown", "c"=>"blue", "red");
$array2 = array("a"=>"green", "b"=>"yellow", "c"=>"yellow", "red");
$a = array('a'=>'green', 'b'=>'brown', 'c'=>'yellow');
$b = array('a'=>'green', 'b'=>'brown', 'c'=>'yellow', 'e'=>'yellow');
$result_array = array_intersect_assoc($a, $b, $array1, $array2);
?>
$args array will look like:
(
0 =>
(
a => green
b => brown
c => yellow
)
1 =>
(
a => green
b => brown
c => yellow
e => yellow
)
2 =>
(
a => green
b => brown
c => blue
0 => red
)
3 =>
(
a => green
b => yellow
c => yellow
0 => red
)
)
$result_array will look like:
(
a => green
)
nleippe at integr8ted dot com
11-Feb-2004 04:46
11-Feb-2004 04:46
A combination of the two functions [array_intersect() and array_intersect_assoc()] in order to obtain the intersection of two multidimensional arrays.
<?php
function array_intersect_assoc_recursive(&$arr1, &$arr2) {
if (!is_array($arr1) || !is_array($arr2)) {
return $arr1 == $arr2; // or === for strict type
}
$commonkeys = array_intersect(array_keys($arr1), array_keys($arr2));
$ret = array();
foreach ($commonkeys as $key) {
$ret[$key] =& array_intersect_assoc_recursive($arr1[$key], $arr2[$key]);
}
return $ret;
}
?>