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PHP Uksort () function

Syntax:
boolean uksort ($array, myFunction);
Parameter:This function takes two parameters and is described below:
  • $array : This parameter specifies an array, which we need to sort.
  • myFunction : This parameter specifies the name of the custom function that will be used to sort the keys of the $array. This comparison function must return an integer.
  • Return value:This function returns a boolean value. Returns TRUE on success or FALSE on failure.The following programs illustrate the uksort() function in PHP:Program 1 :  
    // custom comparison function function my_sort ( $x , $y ) { if ( $x == $y ) return 0; return ( $x > $y )? -eleven; }  
    // input array $names = array ( " 10 " = > " javascript " , "20" = > "php" , "60" = > "vbscript" , " 40 " = > "jsp" ); uksort ( $names , " my_sort " );  
    // print the sorted array print_r ( $names ); ?>
    Output:
    Array ([ 60] = > vbscript [40] = > jsp [20] = > php [10] = > javascript)
    Program 2 :  
    // custom comparison function function my_sort ( $x , $y ) { if ( $x == $y ) retur n 0; return ( $x > $y )? eleven; }  
    // input array $names = array ( " 10 " = > " javascript " , "20" = > "php" , "60" = > "vbscript" , " 40 " = > "jsp" ); uksort ( $names , " my_sort " );  
    // print the sorted array print_r ( $names ); ?>
    Output:
    Array ([ 10] = > javascript [20] = > php [40] = > jsp [60] = > vbscript)
    Note . If two values ​​are compared as equal according to a custom compare function, their order in the output array will be undefined.Link :
    http://php.net/manual/en/function.uksort.php

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