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php判断是否为数组程序代码

Jun 13, 2016 am 11:15 AM
array php for code function judgment use exist array program Simple

在php中判断是否为数组很简单,php中利用is_array() 函数就可以快速判断变量是否为数组了,下面我来给大家介绍。  

is_array — 检测变量是否是数组

Report a bug 描述
bool is_array ( mixed $var )

如果 var 是 array,则返回 TRUE,否则返回 FALSE。

 代码如下 复制代码

$a =1;

if( is_array( $a ) )
{
  echo '是数组';
}
else
{
   echo '不是数组0';
}

 代码如下 复制代码

function is_vector( &$array ) {
   if ( !is_array($array) || empty($array) ) {
      return -1;
   }
   $next = 0;
   foreach ( $array as $k => $v ) {
      if ( $k !== $next ) return false;
      $next++;
   }
   return true;
}
?>

判断是否索引数组的方法

echo is_assoc($array)?'索引数组':'不是索引数组';

 代码如下 复制代码

function is_assoc($array) {
        if(is_array($array)) {
            $keys = array_keys($array);
            return $keys != array_keys($keys);
        }
        return false;
}


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