php array operations

• Add an element to the array

<code><span>$arr</span>[] = <span>"caokaiyan"</span>;<span>//</span>键为数字键
<span>$arr</span>[<span>'xuehao'</span>] = <span>1001121213</span>;</code>

• ?Delete an element in the array

<code><span>unset</span>(<span>$arr</span>[<span>'xuehao'</span>]);</code>

• Traverse the elements in the arrayke y and

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  The above has introduced PHP array operations, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.