PHP 5 Array 函数

亦凉 2024-04-07 11:46 63阅读 0赞

### PHP Array 简介 ###

PHP Array 函数允许您访问并操作数组。

支持简单的数组和多维数组。

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### 安装 ###

PHP Array 函数是 PHP 核心的组成部分。无需安装即可使用这些函数。

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### PHP 5 Array 函数 ###

<table> 
 <tbody> 
  <tr> 
   <th>函数</th> 
   <th>描述</th> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array.html" title="array()" rel="nofollow">array()</a></td> 
   <td>创建数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-change-key-case.html" title="array_change_key_case()" rel="nofollow">array_change_key_case()</a></td> 
   <td>返回其键均为大写或小写的数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-chunk.html" title="array_chunk()" rel="nofollow">array_chunk()</a></td> 
   <td>把一个数组分割为新的数组块。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-column.html" title="array_column()" rel="nofollow">array_column()</a></td> 
   <td>返回输入数组中某个单一列的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-combine.html" title="array_combine()" rel="nofollow">array_combine()</a></td> 
   <td>通过合并两个数组（一个为键名数组，一个为键值数组）来创建一个新数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-count-values.html" title="array_count_values()" rel="nofollow">array_count_values()</a></td> 
   <td>用于统计数组中所有值出现的次数。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-diff.html" title="array_diff()" rel="nofollow">array_diff()</a></td> 
   <td>比较数组，返回两个数组的差集（只比较键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-diff-assoc.html" title="array_diff_assoc()" rel="nofollow">array_diff_assoc()</a></td> 
   <td>比较数组，返回两个数组的差集（比较键名和键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-diff-key.html" title="array_diff_key()" rel="nofollow">array_diff_key()</a></td> 
   <td>比较数组，返回两个数组的差集（只比较键名）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-diff-uassoc.html" title="array_diff_uassoc()" rel="nofollow">array_diff_uassoc()</a></td> 
   <td>比较数组，返回两个数组的差集（比较键名和键值，使用用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-diff-ukey.html" title="array_diff_ukey()" rel="nofollow">array_diff_ukey()</a></td> 
   <td>比较数组，返回两个数组的差集（只比较键名，使用用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-fill.html" title="array_fill()" rel="nofollow">array_fill()</a></td> 
   <td>用给定的键值填充数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-fill-keys.html" title="array_fill_keys()" rel="nofollow">array_fill_keys()</a></td> 
   <td>用给定的指定键名的键值填充数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-filter.html" title="array_filter()" rel="nofollow">array_filter()</a></td> 
   <td>用回调函数过滤数组中的元素。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-flip.html" title="array_flip()" rel="nofollow">array_flip()</a></td> 
   <td>反转/交换数组中的键名和对应关联的键值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-intersect.html" title="array_intersect()" rel="nofollow">array_intersect()</a></td> 
   <td>比较数组，返回两个数组的交集（只比较键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-intersect-assoc.html" title="array_intersect_assoc()" rel="nofollow">array_intersect_assoc()</a></td> 
   <td>比较数组，返回两个数组的交集（比较键名和键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-intersect-key.html" title="array_intersect_key()" rel="nofollow">array_intersect_key()</a></td> 
   <td>比较数组，返回两个数组的交集（只比较键名）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-intersect-uassoc.html" title="array_intersect_uassoc()" rel="nofollow">array_intersect_uassoc()</a></td> 
   <td>比较数组，返回两个数组的交集（比较键名和键值，使用用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-intersect-ukey.html" title="array_intersect_ukey()" rel="nofollow">array_intersect_ukey()</a></td> 
   <td>比较数组，返回两个数组的交集（只比较键名，使用用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-key-exists.html" title="array_key_exists()" rel="nofollow">array_key_exists()</a></td> 
   <td>检查指定的键名是否存在于数组中。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-key-first.html" title="array_key_first()" rel="nofollow">array_key_first()</a></td> 
   <td>获取指定数组的第一个键值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-key-last.html" title="array_key_last()" rel="nofollow">array_key_last()</a></td> 
   <td>获取指定数组的最后一个键值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-keys.html" title="array_keys()" rel="nofollow">array_keys()</a></td> 
   <td>返回数组中所有的键名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-map.html" title="array_map()" rel="nofollow">array_map()</a></td> 
   <td>将用户自定义函数作用到给定数组的每个值上，返回新的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-merge.html" title="array_merge()" rel="nofollow">array_merge()</a></td> 
   <td>把一个或多个数组合并为一个数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-merge-recursive.html" title="array_merge_recursive()" rel="nofollow">array_merge_recursive()</a></td> 
   <td>递归地把一个或多个数组合并为一个数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-multisort.html" title="array_multisort()" rel="nofollow">array_multisort()</a></td> 
   <td>对多个数组或多维数组进行排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-pad.html" title="array_pad()" rel="nofollow">array_pad()</a></td> 
   <td>将指定数量的带有指定值的元素插入到数组中。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-pop.html" title="array_pop()" rel="nofollow">array_pop()</a></td> 
   <td>删除数组中的最后一个元素（出栈）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-product.html" title="array_product()" rel="nofollow">array_product()</a></td> 
   <td>计算数组中所有值的乘积。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-push.html" title="array_push()" rel="nofollow">array_push()</a></td> 
   <td>将一个或多个元素插入数组的末尾（入栈）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-rand.html" title="array_rand()" rel="nofollow">array_rand()</a></td> 
   <td>从数组中随机选出一个或多个元素，返回键名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-reduce.html" title="array_reduce()" rel="nofollow">array_reduce()</a></td> 
   <td>通过使用用户自定义函数，迭代地将数组简化为一个字符串，并返回。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-replace.html" title="array_replace()" rel="nofollow">array_replace()</a></td> 
   <td>使用后面数组的值替换第一个数组的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-replace-recursive.html" title="array_replace_recursive()" rel="nofollow">array_replace_recursive()</a></td> 
   <td>递归地使用后面数组的值替换第一个数组的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-reverse.html" title="array_reverse()" rel="nofollow">array_reverse()</a></td> 
   <td>将原数组中的元素顺序翻转，创建新的数组并返回。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-search.html" title="array_search()" rel="nofollow">array_search()</a></td> 
   <td>在数组中搜索给定的值，如果成功则返回相应的键名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-shift.html" title="array_shift()" rel="nofollow">array_shift()</a></td> 
   <td>删除数组中的第一个元素，并返回被删除元素的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-slice.html" title="array_slice()" rel="nofollow">array_slice()</a></td> 
   <td>返回数组中的选定部分。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-splice.html" title="array_splice()" rel="nofollow">array_splice()</a></td> 
   <td>把数组中的指定元素去掉并用其它值取代。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-sum.html" title="array_sum()" rel="nofollow">array_sum()</a></td> 
   <td>返回数组中所有值的和。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-udiff.html" title="array_udiff()" rel="nofollow">array_udiff()</a></td> 
   <td>比较数组，返回两个数组的差集（只比较键值，使用一个用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-udiff-assoc.html" title="array_udiff_assoc()" rel="nofollow">array_udiff_assoc()</a></td> 
   <td>比较数组，返回两个数组的差集（比较键名和键值，使用内建函数比较键名，使用用户自定义函数比较键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-udiff-uassoc.html" title="array_udiff_uassoc()" rel="nofollow">array_udiff_uassoc()</a></td> 
   <td>比较数组，返回两个数组的差集（比较键名和键值，使用两个用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-uintersect.html" title="array_uintersect()" rel="nofollow">array_uintersect()</a></td> 
   <td>比较数组，返回两个数组的交集（只比较键值，使用一个用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-uintersect-assoc.html" title="array_uintersect_assoc()" rel="nofollow">array_uintersect_assoc()</a></td> 
   <td>比较数组，返回两个数组的交集（比较键名和键值，使用内建函数比较键名，使用用户自定义函数比较键值）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-uintersect-uassoc.html" title="array_uintersect_uassoc()" rel="nofollow">array_uintersect_uassoc()</a></td> 
   <td>比较数组，返回两个数组的交集（比较键名和键值，使用两个用户自定义的键名比较函数）。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-unique.html" title="array_unique()" rel="nofollow">array_unique()</a></td> 
   <td>删除数组中重复的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-unshift.html" title="array_unshift()" rel="nofollow">array_unshift()</a></td> 
   <td>在数组开头插入一个或多个元素。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-values.html" title="array_values()" rel="nofollow">array_values()</a></td> 
   <td>返回数组中所有的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-walk.html" title="array_walk()" rel="nofollow">array_walk()</a></td> 
   <td>对数组中的每个成员应用用户函数。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-walk-recursive.html" title="array_walk_recursive()" rel="nofollow">array_walk_recursive()</a></td> 
   <td>对数组中的每个成员递归地应用用户函数。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-arsort.html" title="arsort()" rel="nofollow">arsort()</a></td> 
   <td>对关联数组按照键值进行降序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-asort.html" title="asort()" rel="nofollow">asort()</a></td> 
   <td>对关联数组按照键值进行升序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-compact.html" title="compact()" rel="nofollow">compact()</a></td> 
   <td>创建一个包含变量名和它们的值的数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-count.html" title="count()" rel="nofollow">count()</a></td> 
   <td>返回数组中元素的数目。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-current.html" title="current()" rel="nofollow">current()</a></td> 
   <td>返回数组中的当前元素。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-each.html" title="each()" rel="nofollow">each()</a></td> 
   <td>返回数组中当前的键／值对。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-end.html" title="end()" rel="nofollow">end()</a></td> 
   <td>将数组的内部指针指向最后一个元素。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-extract.html" title="extract()" rel="nofollow">extract()</a></td> 
   <td>从数组中将变量导入到当前的符号表。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-in-array.html" title="in_array()" rel="nofollow">in_array()</a></td> 
   <td>检查数组中是否存在指定的值。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-key.html" title="key()" rel="nofollow">key()</a></td> 
   <td>从关联数组中取得键名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-krsort.html" title="krsort()" rel="nofollow">krsort()</a></td> 
   <td>对关联数组按照键名降序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-ksort.html" title="ksort()" rel="nofollow">ksort()</a></td> 
   <td>对关联数组按照键名升序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-list.html" title="list()" rel="nofollow">list()</a></td> 
   <td>把数组中的值赋给一些数组变量。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-natcasesort.html" title="natcasesort()" rel="nofollow">natcasesort()</a></td> 
   <td>用"自然排序"算法对数组进行不区分大小写字母的排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-natsort.html" title="natsort()" rel="nofollow">natsort()</a></td> 
   <td>用"自然排序"算法对数组排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-next.html" title="next()" rel="nofollow">next()</a></td> 
   <td>将数组中的内部指针向后移动一位。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-pos.html" title="pos()" rel="nofollow">pos()</a></td> 
   <td>current() 的别名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-prev.html" title="prev()" rel="nofollow">prev()</a></td> 
   <td>将数组的内部指针倒回一位。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-range.html" title="range()" rel="nofollow">range()</a></td> 
   <td>创建一个包含指定范围的元素的数组。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-reset.html" title="reset()" rel="nofollow">reset()</a></td> 
   <td>将数组的内部指针指向第一个元素。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-rsort.html" title="rsort()" rel="nofollow">rsort()</a></td> 
   <td>对数值数组进行降序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-shuffle.html" title="shuffle()" rel="nofollow">shuffle()</a></td> 
   <td>把数组中的元素按随机顺序重新排列。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-sizeof.html" title="sizeof()" rel="nofollow">sizeof()</a></td> 
   <td>count() 的别名。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-sort.html" title="sort()" rel="nofollow">sort()</a></td> 
   <td>对数值数组进行升序排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-uasort.html" title="uasort()" rel="nofollow">uasort()</a></td> 
   <td>使用用户自定义的比较函数对数组中的键值进行排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-uksort.html" title="uksort()" rel="nofollow">uksort()</a></td> 
   <td>使用用户自定义的比较函数对数组中的键名进行排序。</td> 
  </tr> 
  <tr> 
   <td><a href="https://www.runoob.com/php/func-array-usort.html" title="usort()" rel="nofollow">usort()</a></td> 
   <td>使用用户自定义的比较函数对数组进行排序。</td> 
  </tr> 
 </tbody> 
</table>