How to sort arrays from small to large by php

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1. Description

Bubble sort is a simple sort algorithm. The name of this algorithm comes from the fact that smaller elements float slowly to the top of the sequence by swapping.

2, the use of methods

Compare adjacent elements. If the first one is bigger than the second one, switch to two.

Each pair of adjacent elements does the same job, from the first pair to the last pair. At this point, the final element should be.

Repeat the above steps for all elements except the last step.

Repeat the above steps each time until there are no pairs of numbers to compare.

3. Examples