php - var_dump in php gives error of illegal character how to avoid it

Question

i have a small function to write contents

function write($data)
{
  file_put_contents("filename.txt",$data,FILE_APPEND);
}

it works good except some where when i do the following

write( var_dump($someObject) );

this gives an error message of

illegal character.

I see the this error message through an alert box in browser the php gets call through an ajax call. Any help in debugging this would be appreciated thanks.

Answer 1

var_dump不会那样工作，因为它直接输出而不是返回输出。如果要捕获输出以便将其写入其他位置，则必须使用输出缓冲：

ob_start();
var_dump($data);
write(ob_get_clean());

或者，var_export只要您记得传递true第二个参数，这也是可行的：

write(var_export($data, true));

Answer 2

该功能var_dump()（请参阅文档）确实会回显所有内容。您应该在此处使用var_export()（请参阅文档）。

write(var_export($data, true));