


PHP method to determine whether an array is ordered_PHP tutorial
How to determine whether an array is ordered in PHP
This article mainly introduces the method in PHP to determine whether an array is ordered, and involves related techniques for operating array traversal in PHP , very practical value, friends in need can refer to it
The example in this article describes how PHP determines whether an array is ordered. Share it with everyone for your reference. The specific analysis is as follows:
The time complexity of this code is O(n)
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<🎜>function JudegSortArray($array) {<🎜> <🎜>if ($array [0] > $array [1]) { $flag = 1; } else { $flag = 0; } $temp = $flag; $len = count ( $array ); for($i = 1; $i < $len; $i ) {<🎜> <🎜>if ($flag == 0) {<🎜> <🎜>if ($array [$i] < $array [$i 1])<🎜> <🎜>{<🎜> <🎜>continue;<🎜> <🎜>} else {<🎜> <🎜>$flag = 1;<🎜> <🎜>break;<🎜> <🎜>}<🎜> <🎜>}<🎜> <🎜>if ($flag == 1) {<🎜> <🎜>if ($array [$i] > $array [$i 1]) { continue; } else { $flag = 0; break; } } } if ($flag != $temp) { echo "Unordered array"; } else { echo "ordered array"; } } //Test case $array = array ( 1, 2, 3, 4, 6, 5 ); $ret = JudegSortArray ( $array ); echo $ret; |

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