Php array diff uassoc
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PHP function array_diff_uassoc
This function compares two or more arrays index based on the first array. Before doing the comparison, this function calls the user-defined callback function to check each array and it returns according to the user-defined function.
Syntax array_diff_uassoc
- array1: first array to use for the comparison with all other arrays
- array2: second array
- array3: third array
- callback: check and return from the user-defined function
array_diff_uassoc(array1, array2, array3, ...,callback);
Note
Do not use duplicate array keys, please see the example.
Example 1
<?php
// call back function to compare two score
function check_score($vscore1, $vscore2) {
if ($vscore1 == $vscore2) {
return 0;
} else if ($vscore1 > $vscore2) {
return 1;
} else {
return -1;
}
}
$check_score = array_diff_uassoc(
array(4 => 'mark', 3 => 'john', 2 => 'jake'),
array(4 => 'mark', 3 => 'john', 12 => 'jake'), "check_score");
print_r($check_score);
?>
Output
Array ( [2] => jake )
Example 2
- This example do not display the result correctly, due to the confuse in the array key.
As you can see, the second array contains array key=53' twice.
- In this condition, you may use another method to compare score for each array key
<?php
// call back function to compare two score
function check_score($vscore1, $vscore2) {
if ($vscore1 == $vscore2) {
return 0;
}
else if ($vscore1 > $vscore2) {
return 1;
} else {
return -1;
}
}
$score1 = array(50 => 'Bob', 53 => 'Janny', 41 => 'Wood',40=>'Makr');
$score2 = array(13 => 'Bob', 53 => 'Janny', 53 => 'Wood',40=>'Makr');
$check_score = array_diff_uassoc($score1, $score2, "check_score");
print_r($check_score);
?>
Output
Array
(
[50] => Bob
[53] => Janny
[41] => Wood
)
</body>
Example 3
<?php
// call back function to compare two score
function callback($vscore1, $vscore2) {
if ($vscore1 == $vscore2) {
return 0;
} else if ($vscore1 > $vscore2) {
return 1;
} else {
return -1;
}
}
$country1 = array('c' => 'cambodia', 'ch' => 'china', 'us' => 'USA');
$country2 = array('c' => 'china', 'ch' => 'chichno', 'us' => 'United States');
$country2 = array('c' => 'chile', 'ch' => 'china', 'us' => 'United States');
$check_score = array_diff_uassoc($country1, $country2, "callback");
print_r($check_score);
?>
Output
Array
(
[c] => cambodia
[us] => USA
)
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
