Share some interesting array methods-PHP Tutorial-php.cn

Share some interesting array methods

藏色散人

Release： 2023-04-07 07:10:01

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Recursively replace elements of the first array using the passed array array_replace_recursive

$base = array(&#39;citrus&#39; => array( "orange") , &#39;berries&#39; => array("blackberry", "raspberry"), );
$replacements = array(&#39;citrus&#39; => array(&#39;pineapple&#39;), &#39;berries&#39; => array(&#39;blueberry&#39;));
$basket = array_replace_recursive($base, $replacements);

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Share some interesting array methods

With index check Calculate the intersection of arrays and use the callback function to compare the indicesarray_intersect_uassoc

$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");
print_r(array_intersect_uassoc($array1, $array2, "strcasecmp"));

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Share some interesting array methods

Recursively merge one or more arrays array_merge_recursive

$ar1 = array("color" => array("favorite" => "red"), 5);\
$ar2 = array(10, "color" => array("favorite" => "green", "blue"));\
$result = array_merge_recursive($ar1, $ar2);

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Share some interesting array methods

Recursively replace the elements of the first array using the passed arrayarray_replace_recursive

$base = array(&#39;citrus&#39; => array( "orange") , &#39;berries&#39; => array("blackberry", "raspberry"), );
$replacements = array(&#39;citrus&#39; => array(&#39;pineapple&#39;), &#39;berries&#39; => array(&#39;blueberry&#39;));
$basket = array_replace_recursive($base, $replacements);
print_r($basket);\

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Convert a linear array to a tree, or multidimensional array

function array_stack (&$a, $p = &#39;@parent&#39;, $c = &#39;@children&#39;)
    {
      $l = $t = array();
      foreach ($a AS $key => $val):
        if (!$val[$p]) $t[$key] =& $l[$key];
        else $l[$val[$p]][$c][$key] =& $l[$key];
        $l[$key] = (array)$l[$key] + $val;
      endforeach;
      return $a = array(&#39;tree&#39; => $t, &#39;leaf&#39; => $l);
    }
    $node = array();
    $node[1] = array(&#39;@parent&#39; => 0, &#39;title&#39; => &#39;I am node 1.&#39;);
    $node[2] = array(&#39;@parent&#39; => 1, &#39;title&#39; => &#39;I am node 2.&#39;);
    $node[3] = array(&#39;@parent&#39; => 2, &#39;title&#39; => &#39;I am node 3.&#39;);
    $node[4] = array(&#39;@parent&#39; => 1, &#39;title&#39; => &#39;I am node 4.&#39;);
    $node[5] = array(&#39;@parent&#39; => 4, &#39;title&#39; => &#39;I am node 5.&#39;);
    print_r(array_stack($node));

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