Home Backend Development PHP Tutorial [php function]--array function--array_chunk

[php function]--array function--array_chunk

Jul 29, 2016 am 09:01 AM
array gt input output

array_chunk

  • Version: >= 4.2
  • Description:
    array_chunk(array $input, int $size, [, bool $preserve_keys=false])
    The function of this function is to divide the array into chunks. This function can be used when we batch process the data in the array.
  • parameter
    • input
      The array to process.
    • size
      Size of array block
    • preserve_keys
      Whether to retain the original data key, the default is not to retain.
  • Example
<code><span>$input</span>=<span>array</span>(<span>"a"</span>=><span>"php"</span>,<span>"b"</span>=><span>"c"</span>,<span>"c"</span>=><span>"c++"</span>,<span>"d"</span>=><span>"python"</span>,<span>"e"</span>=><span>"ruby"</span>);
<span>$output</span> = array_chunk(<span>$input</span>, <span>2</span>);
<span>#output=></span><span>Array</span>
(
    [<span>0</span>] => <span>Array</span>
        (
            [<span>0</span>] => php
            [<span>1</span>] => c
        )

    [<span>1</span>] => <span>Array</span>
        (
            [<span>0</span>] => c++
            [<span>1</span>] => python
        )

    [<span>2</span>] => <span>Array</span>
        (
            [<span>0</span>] => ruby
        )

)

<span>$output2</span> = array_chunk(<span>$input</span>, <span>2</span>, <span>true</span>);
<span>#output2=> </span><span>Array</span>
(
    [<span>0</span>] => <span>Array</span>
        (
            [a] => php
            [b] => c
        )

    [<span>1</span>] => <span>Array</span>
        (
            [c] => c++
            [d] => python
        )

    [<span>2</span>] => <span>Array</span>
        (
            [e] => ruby
        )

)
<span>#注意子数组中的key还是保留原来数组中的key</span></code>
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