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>uksort -- 
     Sort an array by keys using a user-defined comparison function
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>Description</H2
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><CODE
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>void uksort</CODE
>(array array, function cmp_function);<P
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>&#13;     This function will sort the keys of an array using a
     user-supplied comparison function.  If the array you wish to sort
     needs to be sorted by some non-trivial criteria, you should use
     this function.

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>Example 1. <B
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>uksort()</B
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>  1&nbsp;
  2&nbsp;function mycompare ($a, $b) {   
  3&nbsp;    if ($a == $b) return 0;
  4&nbsp;    return ($a &#62; $b) ? -1 : 1;
  5&nbsp;}
  6&nbsp;$a = array (4 =&#62; "four", 3 =&#62; "three", 20 =&#62; "twenty", 10 =&#62; "ten");
  7&nbsp;uksort ($a, mycompare);
  8&nbsp;while (list ($key, $value) = each ($a)) {
  9&nbsp;    echo "$key: $value\n";
 10&nbsp;}
 11&nbsp;      </PRE
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>
     This example would display:
     <TT
CLASS="computeroutput"
>&#13;20: twenty
10: ten
4: four
3: three
     </TT
>
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>&#13;     See also: <A
HREF="function.arsort.html"
><B
CLASS="function"
>arsort()</B
></A
>,
     <A
HREF="function.asort.html"
><B
CLASS="function"
>asort()</B
></A
>, <A
HREF="function.uasort.html"
><B
CLASS="function"
>uasort()</B
></A
>,
     <A
HREF="function.ksort.html"
><B
CLASS="function"
>ksort()</B
></A
>, <A
HREF="function.rsort.html"
><B
CLASS="function"
>rsort()</B
></A
>, and
     <A
HREF="function.sort.html"
><B
CLASS="function"
>sort()</B
></A
>.
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