How to write array variables to a file in PHP_PHP Tutorial

How to write array variables to a file in PHP

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. 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 work so hard just for debugging?

Here you can use var_export()

This function returns structural information about the variables passed to the function. It is similar to var_dump(), except that the representation returned is normal 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, it is output directly.

In addition, if your $content is just an array and contains no 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);

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http://www.bkjia.com/PHPjc/991316.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/991316.htmlTechArticleHow to write array variables to a file in PHP. Use PHP to record logs, or Ajax request error and want to debug. time. We usually write information to a specified file...