php array_search()实现数组值删除
array_search() 函数与 in_array() 一样，在数组中查找一个键值。如果找到了该值，匹配元素的键名会被返回。如果没找到，则返回 false。
array_search() 函数与 in_array() 一样，在数组中查找一个键值。如果找到了该值，匹配元素的键名会被返回。如果没找到，则返回 false。
如果第三个参数 strict 被指定为 true，则只有在数据类型和值都一致时才返回相应元素的键名
array_search(value,array,strict)
实例
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