PHP具有多个;“儿童”;“中的数组”;“家长”;数组以及如何访问它们
我正在尝试创建一个存储各种相册的阵列 到目前为止,我有以下代码PHP具有多个;“儿童”;“中的数组”;“家长”;数组以及如何访问它们,php,arrays,Php,Arrays,我正在尝试创建一个存储各种相册的阵列 到目前为止,我有以下代码 $photos = array( array("karate","1","2"), array("judo","1","2"), array("kickboxing","1","2"), array("womenselfdefense","1","2") ); $sections = array("karate"
$photos = array(
array("karate","1","2"),
array("judo","1","2"),
array("kickboxing","1","2"),
array("womenselfdefense","1","2")
);
$sections = array("karate","judo","kickboxing","womenselfdefense");
foreach($sections as $keys => $section)
{
echo count($photos[$section]);
}
但我认为我没有正确设置我的阵列,理想情况下,我希望主阵列$照片中有4个单独的阵列$空手道,$柔道,$跆拳道,$女子自卫
首先,我想计算每个数组中的项目数,然后在每个数组中随机选择一个项目,但是我相信目前在photos数组中有4个未命名的数组,因此我的代码返回几个未定义的索引:errors
有人能帮我吗?我想你是想用
echo count($photos[$keys]);
我想你是想用
echo count($photos[$keys]);
您可以使用相册的名称作为照片数组的键
$photos = array(
"karate" => array("1","2"),
"judo" => array("1","2"),
"kickboxing" => array("1","2"),
"womenselfdefense" => array("1","2")
);
$sections = array("karate","judo","kickboxing","womenselfdefense");
foreach($sections as $keys => $section)
{
echo count($photos[$section]).'<br>';
}
$photos=array(
“空手道”=>数组(“1”、“2”),
“柔道”=>数组(“1”、“2”),
“跆拳道”=>数组(“1”、“2”),
“womenselfdefense”=>数组(“1”、“2”)
);
$sections=阵列(“空手道”、“柔道”、“跆拳道”、“女性自卫”);
foreach($keys=>$section)
{
回声计数($photos[$section])。
;
}
您可以使用相册的名称作为照片阵列的键
$photos = array(
"karate" => array("1","2"),
"judo" => array("1","2"),
"kickboxing" => array("1","2"),
"womenselfdefense" => array("1","2")
);
$sections = array("karate","judo","kickboxing","womenselfdefense");
foreach($sections as $keys => $section)
{
echo count($photos[$section]).'<br>';
}
$photos=array(
“空手道”=>数组(“1”、“2”),
“柔道”=>数组(“1”、“2”),
“跆拳道”=>数组(“1”、“2”),
“womenselfdefense”=>数组(“1”、“2”)
);
$sections=阵列(“空手道”、“柔道”、“跆拳道”、“女性自卫”);
foreach($keys=>$section)
{
回声计数($photos[$section])。
;
}
我想您正在寻找一个,它使用标签而不是数字作为键:
$photos = array(
"karate" => array("1","2"),
"judo" => array("1","2"),
"kickboxing" => array("1","2"),
"womenselfdefense" => array("1","2")
);
foreach ($photos as $section=>$values) {
//now $values is your array of numbers
echo count($values);
}
或者,用现代语法:
$photos = [
"karate" => [1, 2],
"judo" => [1, 2],
"kickboxing" => [1, 2],
"womenselfdefense" => [1, 2],
];
我想您正在寻找一个,它使用标签而不是数字作为键:
$photos = array(
"karate" => array("1","2"),
"judo" => array("1","2"),
"kickboxing" => array("1","2"),
"womenselfdefense" => array("1","2")
);
foreach ($photos as $section=>$values) {
//now $values is your array of numbers
echo count($values);
}
或者,用现代语法:
$photos = [
"karate" => [1, 2],
"judo" => [1, 2],
"kickboxing" => [1, 2],
"womenselfdefense" => [1, 2],
];
您正在尝试访问数组,而不为更高级别的数组分配任何键 试着这样做:
$photos = array(
'karate' => array("karate","1","2"),
'judo' => array("judo","1","2"),
'kickboxing' => array("kickboxing","1","2"),
'womenselfdefense' => array("womenselfdefense","1","2")
);
您正在尝试访问数组,而不为更高级别的数组分配任何键 试着这样做:
$photos = array(
'karate' => array("karate","1","2"),
'judo' => array("judo","1","2"),
'kickboxing' => array("kickboxing","1","2"),
'womenselfdefense' => array("womenselfdefense","1","2")
);
我们不明白这是为了什么?做一个
print\r($photos)
应该显示你的错误我们不明白这是为了什么?做一个print\r($photos)
应该显示你的错误,但是你已经更改了数组以适应你的目的。这并没有回答OP的问题这看起来很有希望,等我回家后再试试,非常感谢@我不符合我的目的。他仍然有4个单独的数组,但是它们由关键字标识。但是您已经更改了数组以满足您的目的。这并没有回答OP的问题这看起来很有希望,等我回家后再试试,非常感谢@我不符合我的目的。他仍然有4个单独的数组,但是它们由关键字标识。