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array udiff function syntax tag tutorial 2013

# Php array udiff () function

<?php ?>

### Php Result

(PHP 5)

array_udiff -- Computes the difference of arrays by using a callback function for data comparison

## Syntax

array array_udiff ( array array1, array array2 [, array ..., callback data_compare_func] )

array_udiff() returns an array containing all the values of array1 that are not present in any of the other arguments. Note that keys are preserved. For the comparison of the data data_compare_func is used. It must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second. This is unlike array_diff() which uses an internal function for comparing the data.

Example 1. array_udiff() example

 ``` priv_member = \$val;    }        function comp_func_cr(\$a, \$b)     {        if (\$a->priv_member === \$b->priv_member) return 0;        return (\$a->priv_member > \$b->priv_member)? 1:-1;    }}\$a = array("0.1" => new cr(9), "0.5" => new cr(12), 0 => new cr(23), 1=> new cr(4), 2 => new cr(-15),);\$b = array("0.2" => new cr(9), "0.5" => new cr(22), 0 => new cr(3), 1=> new cr(4), 2 => new cr(-15),);\$result = array_udiff(\$a, \$b, array("cr", "comp_func_cr"));print_r(\$result);?> ```

The above example will output:

 ```Array ( [0.5] => cr Object ( [priv_member:private] => 12 ) [0] => cr Object ( [priv_member:private] => 23 ) )```

Note: Two elements are considered equal if and only if (string) \$elem1 === (string) \$elem2. In words: when the string representation is the same.

Note: Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_udiff(\$array1[0], \$array2[0], "data_compare_func");.

## Php array udiff Function syntax tag

array udiff php code on this is provided for your study purpose, it will guide you to know how create and design a website using php. use it to practice and train your self online

### Php array udiff syntax tutorial

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