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>array_diff_ukey</H1
><DIV
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><A
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></A
><P
> (PHP 5 >= 5.1.0RC1)</P
>array_diff_ukey -- Computes the difference of arrays using a callback function on the keys for comparison</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN10444"
></A
><H2
>Description</H2
>array <B
CLASS="methodname"
>array_diff_ukey</B
> ( array array1, array array2 [, array ..., callback key_compare_func] )<BR
></BR
><P
> <B
CLASS="function"
>array_diff_ukey()</B
> returns an array
containing all the values of <CODE
CLASS="parameter"
>array1</CODE
>
that have keys that are not present in any of the other arguments.
Note that the associativity is preserved. This function is like
<A
HREF="function.array-diff.html"
><B
CLASS="function"
>array_diff()</B
></A
> except the comparison is done on the
keys instead of the values.
</P
><P
> This comparison is done by a user supplied callback function.
It must return an integer less than, equal to, or greater than zero if the
first key is considered to be respectively less than, equal to, or
greater than the second.
</P
><P
> <TABLE
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><TD
><DIV
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NAME="AEN10467"
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><P
><B
>Exemplo 1. <B
CLASS="function"
>array_diff_ukey()</B
> example</B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">key_compare_func</font><font color="#007700">(</font><font color="#0000BB">$key1</font><font color="#007700">, </font><font color="#0000BB">$key2</font><font color="#007700">)<br />{<br /> if (</font><font color="#0000BB">$key1 </font><font color="#007700">== </font><font color="#0000BB">$key2</font><font color="#007700">)<br /> return </font><font color="#0000BB">0</font><font color="#007700">;<br /> else if (</font><font color="#0000BB">$key1 </font><font color="#007700">> </font><font color="#0000BB">$key2</font><font color="#007700">)<br /> return </font><font color="#0000BB">1</font><font color="#007700">;<br /> else<br /> return -</font><font color="#0000BB">1</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">$array1 </font><font color="#007700">= array(</font><font color="#DD0000">'blue' </font><font color="#007700">=> </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#DD0000">'red' </font><font color="#007700">=> </font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#DD0000">'green' </font><font color="#007700">=> </font><font color="#0000BB">3</font><font color="#007700">, </font><font color="#DD0000">'purple' </font><font color="#007700">=> </font><font color="#0000BB">4</font><font color="#007700">);<br /></font><font color="#0000BB">$array2 </font><font color="#007700">= array(</font><font color="#DD0000">'green' </font><font color="#007700">=> </font><font color="#0000BB">5</font><font color="#007700">, </font><font color="#DD0000">'blue' </font><font color="#007700">=> </font><font color="#0000BB">6</font><font color="#007700">, </font><font color="#DD0000">'yellow' </font><font color="#007700">=> </font><font color="#0000BB">7</font><font color="#007700">, </font><font color="#DD0000">'cyan' </font><font color="#007700">=> </font><font color="#0000BB">8</font><font color="#007700">);<br /><br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">array_diff_ukey</font><font color="#007700">(</font><font color="#0000BB">$array1</font><font color="#007700">, </font><font color="#0000BB">$array2</font><font color="#007700">, </font><font color="#DD0000">'key_compare_func'</font><font color="#007700">));<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
><P
>O exemplo acima irá imprimir:</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>array(2) {
["red"]=>
int(2)
["purple"]=>
int(4)
}</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
Please note that this function only checks one dimension of a n-dimensional
array. Of course you can check deeper dimensions by using
<TT
CLASS="literal"
>array_diff_ukey($array1[0], $array2[0], 'callback_func');</TT
>.
</P
></BLOCKQUOTE
></DIV
><P
> See also <A
HREF="function.array-diff.html"
><B
CLASS="function"
>array_diff()</B
></A
>,
<A
HREF="function.array-udiff.html"
><B
CLASS="function"
>array_udiff()</B
></A
>
<A
HREF="function.array-diff-assoc.html"
><B
CLASS="function"
>array_diff_assoc()</B
></A
>,
<A
HREF="function.array-diff-uassoc.html"
><B
CLASS="function"
>array_diff_uassoc()</B
></A
>,
<A
HREF="function.array-udiff-assoc.html"
><B
CLASS="function"
>array_udiff_assoc()</B
></A
>,
<A
HREF="function.array-udiff-uassoc.html"
><B
CLASS="function"
>array_udiff_uassoc()</B
></A
>,
<A
HREF="function.array-diff-key.html"
><B
CLASS="function"
>array_diff_key()</B
></A
>,
<A
HREF="function.array-intersect.html"
><B
CLASS="function"
>array_intersect()</B
></A
>,
<A
HREF="function.array-intersect-assoc.html"
><B
CLASS="function"
>array_intersect_assoc()</B
></A
>,
<A
HREF="function.array-intersect-uassoc.html"
><B
CLASS="function"
>array_intersect_uassoc()</B
></A
>,
<A
HREF="function.array-intersect-key.html"
><B
CLASS="function"
>array_intersect_key()</B
></A
> and
<A
HREF="function.array-intersect-ukey.html"
><B
CLASS="function"
>array_intersect_ukey()</B
></A
>.
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