[英]PHP: Efficient way to access nested array elements?
我正在整理一些旧的代码,我遇到的工作包括各种数组,我想将它们组合成嵌套数组,并想知道一种简单的循环嵌套数组内容的方式(很可能是有一个比起嵌套数组更好的存储数据的方法,如果是这样,建议欢迎)。
下面的代码只是原始代码结构的一个例子,行为方式与广义输出相同。
$ someArray元素过去是单独定义的,这似乎非常耗时,因此我想改变它的原因:
$fruit['fruit']['apple']['size'] = 'small';
$fruit['fruit']['apple']['colour'] = 'red';
$fruit['fruit']['apple']['taste'] = 'bitter';
$fruit['fruit']['pear']['size'] = 'big';
$fruit['fruit']['pear']['colour'] = 'green';
$fruit['fruit']['pear']['taste'] = 'sweet';
这是我正在构建的嵌套数组的示例:
class someEntity
{
public function someFunction()
{
$someArray = array
(
'apple' => array(
'size' => 'small',
'colour' => 'red',
'taste' => 'bitter'
),
'pear' => array(
'size' => 'big',
'colour' => 'green',
'taste' => 'sweet'
)
);
return($someArray);
}
public function anotherFunction()
{
# some other stuff
}
}
通过foreach循环调用:
$someArray= someEntity::someFunction();
var_dump($someArray);
foreach($someArray as $key)
{
foreach($key as $key => $value)
{
print($key.': '.$value.'<br>');
}
}
array (size=2)
'apple' =>
array (size=3)
'size' => string 'small' (length=5)
'colour' => string 'red' (length=3)
'taste' => string 'bitter' (length=6)
'pear' =>
array (size=3)
'size' => string 'big' (length=3)
'colour' => string 'green' (length=5)
'taste' => string 'sweet' (length=5)
输出 :
尺寸:小颜色:红色味道:苦味大小:大颜色:绿色味道:甜
问题 :
考虑 :
先感谢您
更新
我使用一个对象重新编写如下。
class fruit
{
private $_type;
private $_size;
private $_colour;
private $_taste;
public function __construct($type,$size,$colour,$taste)
{
$this->_type = $type;
$this->_size = $size;
$this->_colour = $colour;
$this->_taste = $taste;
}
public function displayFruitData()
{
echo'<br>'.$this->_type.'<br>'.$this->_size.'<br>'.$this->_colour.'<br>'.$this->_taste.'<br><br>';
}
}
$fruit1 = new fruit("apple","small","red","bitter");
$fruit2 = new fruit("pear","medium","yellow","sweet");
$fruit3 = new fruit("pineapple","large","brown","sweet");
$output = $fruit1->displayFruitData();
$output = $fruit2->displayFruitData();
$output = $fruit3->displayFruitData();
exit();
你可以这样轻松地做到这一点
<?php
$fruits = array('apple', 'pear');
$size = array('apple' => 'small', 'pear' => 'big');
$colour = array('apple' => 'red', 'pear' => 'green');
$taste = array('apple' => 'bitter', 'pear' => 'sweet');
foreach($fruits as $fruit)
{
echo "$fruit Size is {$size[$fruit]}<br />";
echo "$fruit Colour is {$colour[$fruit]}<br />";
echo "$fruit Taste is {$taste[$fruit]}<br />";
echo '<br />';
}
?>
产量
apple Size is small
apple Colour is red
apple Taste is bitter
pear Size is big
pear Colour is green
pear Taste is sweet
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