Php array diff ukey
From w3cyberlearnings
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PHP function array_diff_ukey
This function compares two or more arrays by using the user-defined function, and the comparison uses array key for the comparison. It returns the array element in the first array that is not found in other arrays.
Syntax array_diff_ukey
- array1: array that other arrays used for the comparsion
- array2: second array
- array3: third array
- callback: user-defined function
array_diff_key(array1, array2, array3, ...,callback);
Example 1
<?php
function check_score($key1, $key2) {
if ($key1 == $key2) {
return 0;
} else if ($key1 > $key2) {
return 1;
} else {
return -1;
}
}
$score1 = array('China'=>30,'Cambodia'=>32,'USA'=>31,'Thailand'=>32);
$score2 = array('Cambodia'=>31,'USA'=>32,'Vietnam'=>42,'China'=>32);
$aa_diff = array_diff_ukey($score1, $score2,"check_score");
print_r($aa_diff);
?>
Output
- Thailand does not contain in the second array.
Array ( [Thailand] => 32 )
Example 2
<?php
function check_score($key1, $key2) {
if ($key1 == $key2) {
return 0;
} else if ($key1 > $key2) {
return 1;
} else {
return -1;
}
}
$score1 = array('China'=>30,'Cambodia'=>32,'USA'=>31,'Thailand'=>32);
$score2 = array('Cambodia'=>31,'USA'=>32,'Vietnam'=>42,'China'=>32);
$aa_diff = array_diff_ukey($score1, $score2,"check_score");
foreach ($aa_diff as $country=>$score) {
echo "The team from {$country} scores {$score} the first play, but missed all in the second play<br/>";
}
?>
Output
The team from Thailand scores 32 the first play, but missed all in the second play
Related Links
- array_change_key_case
- array_chunk
- array_combine
- array_count_values
- array_diff_assoc
- array_diff_key
- array_diff_uassoc
- array_diff_ukey
- array_diff
- array_fill_keys
- array_fill
- array_filter
- array_flip
- array_intersect_assoc
- array_intersect_key
- array_intersect_uassoc
- array_intersect_ukey
- array_intersect
- array_key_ exists
- array_keys
