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>array_udiff</H1
><DIV
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NAME="AEN11824"
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><P
> (PHP 5)</P
>array_udiff -- Computes the difference of arrays by using a callback function for data comparison</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN11827"
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><H2
>Description</H2
>array <B
CLASS="methodname"
>array_udiff</B
> ( array array1, array array2 [, array ..., callback data_compare_func] )<BR
></BR
><P
> <B
CLASS="function"
>array_udiff()</B
> returns an array
containing all the values of <CODE
CLASS="parameter"
>array1</CODE
>
that are not present in any of the other arguments.
Note that keys are preserved. For the comparison of the data
<CODE
CLASS="parameter"
>data_compare_func</CODE
> 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 <A
HREF="function.array-diff.html"
><B
CLASS="function"
>array_diff()</B
></A
> which uses an
internal function for comparing the data.
</P
><P
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><P
><B
>Exemplo 1. <B
CLASS="function"
>array_udiff()</B
> example</B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br /></font><font color="#007700">class </font><font color="#0000BB">cr </font><font color="#007700">{<br /> </font><font color="#0000BB">private $priv_member</font><font color="#007700">;<br /> function </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">$val</font><font color="#007700">)<br /> {<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">priv_member </font><font color="#007700">= </font><font color="#0000BB">$val</font><font color="#007700">;<br /> }<br /><br /> function </font><font color="#0000BB">comp_func_cr</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">$b</font><font color="#007700">)<br /> {<br /> if (</font><font color="#0000BB">$a</font><font color="#007700">-></font><font color="#0000BB">priv_member </font><font color="#007700">=== </font><font color="#0000BB">$b</font><font color="#007700">-></font><font color="#0000BB">priv_member</font><font color="#007700">) return </font><font color="#0000BB">0</font><font color="#007700">;<br /> return (</font><font color="#0000BB">$a</font><font color="#007700">-></font><font color="#0000BB">priv_member </font><font color="#007700">> </font><font color="#0000BB">$b</font><font color="#007700">-></font><font color="#0000BB">priv_member</font><font color="#007700">)? </font><font color="#0000BB">1</font><font color="#007700">:-</font><font color="#0000BB">1</font><font color="#007700">;<br /> }<br />}<br /></font><font color="#0000BB">$a </font><font color="#007700">= array(</font><font color="#DD0000">"0.1" </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">9</font><font color="#007700">), </font><font color="#DD0000">"0.5" </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">12</font><font color="#007700">), </font><font color="#0000BB">0 </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">23</font><font color="#007700">), </font><font color="#0000BB">1</font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">4</font><font color="#007700">), </font><font color="#0000BB">2 </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(-</font><font color="#0000BB">15</font><font color="#007700">),);<br /></font><font color="#0000BB">$b </font><font color="#007700">= array(</font><font color="#DD0000">"0.2" </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">9</font><font color="#007700">), </font><font color="#DD0000">"0.5" </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">22</font><font color="#007700">), </font><font color="#0000BB">0 </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">3</font><font color="#007700">), </font><font color="#0000BB">1</font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(</font><font color="#0000BB">4</font><font color="#007700">), </font><font color="#0000BB">2 </font><font color="#007700">=> new </font><font color="#0000BB">cr</font><font color="#007700">(-</font><font color="#0000BB">15</font><font color="#007700">),);<br /><br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">array_udiff</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">$b</font><font color="#007700">, array(</font><font color="#DD0000">"cr"</font><font color="#007700">, </font><font color="#DD0000">"comp_func_cr"</font><font color="#007700">));<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
><P
>O exemplo acima irá imprimir:</P
><TABLE
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><PRE
CLASS="screen"
>Array
(
[0.5] => cr Object
(
[priv_member:private] => 12
)
[0] => cr Object
(
[priv_member:private] => 23
)
)</PRE
></TD
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>
</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_udiff($array1[0], $array2[0], "data_compare_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-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-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-uintersect.html"
><B
CLASS="function"
>array_uintersect()</B
></A
>,
<A
HREF="function.array-uintersect-assoc.html"
><B
CLASS="function"
>array_uintersect_assoc()</B
></A
> and
<A
HREF="function.array-uintersect-uassoc.html"
><B
CLASS="function"
>array_uintersect_uassoc()</B
></A
>.
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