问题描述
我想使用提取函数将数组值转换为变量.作为提取功能，将数组键用作变量名，将值用作变量值.我有一个带有数字键的数组，如下所示:
I want to convert array values into variables using extract function. As extract function uses array keys as variable names and values as variable values.I have an array with numeric keys as shown:
$my_array = array(0 =>"Cat", 1=>"Dog", 2=>"Horse");
extract($my_array);
我将如何在此处使用数字键作为变量名称来访问值?还是 extract()只处理字符串键?
How i would use numeric keys here as variable names to access values? Or extract() just deal with string keys?
推荐答案
根据手册，
您可以在 extract()函数中添加前缀.在下面的示例中，这会将 var _ 前缀添加到每个实例.您可以提供任何有效的变量前缀作为第三个参数-创建的变量将在 extract()函数中反映该参数.
You can add a prefix to your extract() function. This would, in the example below, add the var_ prefix to each instance. You can supply whatever valid variable-prefix as the third argument - the created variables would reflect that parameter in the extract() function.
$my_array = array(0 =>"Cat", 1=>"Dog", 2=>"Horse");
extract($my_array, EXTR_PREFIX_ALL, "var");
现在可以通过 $ var_2 在 $ var_0 中找到结果.
The results can now be found in $var_0 through $var_2.
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