This article is a detailed analysis and introduction to the three forms of PHP array (array) output. For those who need it, please refer to
The code is as follows:
$bbbb=array("11"=>"aaa","22"=>"bbb");
//只能输出值value不能输出key
foreach($bbbb as $color)
{
echo $color;
}
//value与key都可输出
foreach($bbbb as $key=>$value)
{
echo $key."=>".$value;
}
//value与key都可输出
while($color=each($bbbb)){
echo $color['key'];
}
或
while(list($key,$value)=each($bbbb)){
echo "$key : $value<br>";
}Direct access to array elements ：
The code is as follows:
<?php $arr=array('w'=>'wen','j'=>'jian','b'=>'bao'); echo($arr['w']),'<br/>';//起作用 echo($arr[w]),'<br/>';//起作用 echo($arr[0]),'<br/>';//不起作用，不知为什么？？？ echo($arr['j']),'<br/>';//起作用 echo($arr[j]),'<br/>';//起作用 echo($arr[1]),'<br/>';//不起作用，不知为什么？？？ echo($arr['b']),'<br/>';//起作用 echo($arr[b]),'<br/>';//起作用 echo($arr[2]),'<br/>';//不起作用，不知为什么？？？ ?>
Output:
The code is as follows:
wen
wen
jian
jian
bao
bao
Suspicious points:
Accessing associative array elements,
1. Can the "key" in [ ] be accessed without using quotation marks ("")? ? ?
2. Array index access doesn’t work? ? ?
The code is as follows:
<?php $arr1=array('wen','jian','bao'); echo $arr1[0],'<br/>',$arr1[1],'<br/>',$arr1[2]; ?>
Output:
The code is as follows:
wen
jian
bao
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