# Fast sorting and Bubble Sorting in php

Source: Internet
Author: User

Fast sorting

<? Php
Function quicksort (\$ str ){
If (count (\$ str) <= 1) return \$ str; // if the number is not big, return directly
\$ Key = \$ str [0]; // obtain a value for comparison later;
\$ Left_arr = array ();
\$ Right_arr = array ();
For (\$ I = 1; \$ I <count (\$ str); \$ I ++) {// place a value greater than \$ key on the right and a small value on the left;
If (\$ str [\$ I] <= \$ key)
\$ Left_arr [] = \$ str [\$ I];
Else
\$ Right_arr [] = \$ str [\$ I];
}
\$ Left_arr = quicksort (\$ left_arr); // recursion;
\$ Right_arr = quicksort (\$ right_arr );
Return array_merge (\$ left_arr, array (\$ key), \$ right_arr); // combines the left and right values into an array;
} // The following is the test
\$ Str = array (, 0 );
Print_r (quicksort (\$ str ));
?>
Bubble Sorting

<? Php
Function bubbingSort (array \$ array)
{
For (\$ I = 0, \$ len = count (\$ array)-1; \$ I <\$ len; ++ \$ I)
{
For (\$ j = \$ len; \$ j> \$ I; -- \$ j)
{
If (\$ array [\$ j] <\$ array [\$ J-1])
{
\$ Temp = \$ array [\$ j];
\$ Array [\$ j] = \$ array [\$ J-1];
\$ Array [\$ J-1] = \$ temp;
}
}
}
Return \$ array;
}

Print '<pre> ';
Print_r (bubbingSort (array (, 9 )));
Print '</pre> ';

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