How to write array variables to file in PHP? _PHP Tutorial

When using PHP to record logs, or when an Ajax request error occurs and you want to debug it. We generally write information to a specified file

Among them. Then deal with the problem based on the corresponding information.

For example, when I cannot get data using Ajax, I like to add the following code to the PHP script

$fp = fopen('./a.txt', 'a+b');

fwrite($fp, $content);

fclose($fp);

However, there is a problem. That is, what if $content is an array?

You might say, I loop the output. What if it’s a multidimensional array?

Do I need to be so tired just for debugging?

Here you can use var_export() .

This function returns structural information about the variables passed to this function. It is similar to var_dump(), except that

The representation returned is valid PHP code.

You can return a representation of a variable by setting the second parameter of the function to TRUE.

$fp = fopen('./a.txt', 'a+b');

fwrite($fp, var_export($content, true));

fclose($fp);

Note that the second parameter of var_export() needs to be set to true to obtain the return value. Otherwise, output directly

In addition, if your $content is just an array and does not contain other content

You can also use print_r()

Similarly, the second parameter of print_r() must also be set to true

$fp = fopen('./a.txt', 'a+b');

fwrite($fp, print_r($content, true));

fclose($fp);

http://www.bkjia.com/PHPjc/477743.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477743.htmlTechArticleWhen using PHP to record logs, or when an Ajax request error occurs and you want to debug it. We generally write information to a specified file. Then deal with the problem based on the corresponding information...