How do I fix the header already sent error in WordPress?

How do I fix the header already sent error in WordPress?

The first thing you need to do when you run into the “Cannot modify header information – headers already sent by” error is to open the file that’s causing the problem. Then, locate the line the message indicates. In this scenario, you can reach the source of the problem using the WordPress theme editor.

What causes the headers already sent error when?

What Does “Cannot Modify Header Information – Headers Already Sent By” Mean? The “Cannot Modify Header Information – Headers Already Sent By” error indicates that a . php file cannot execute because an output is being sent before calling an HTTP header. Headers always need to precede the output.

What causes the following warning Cannot modify header information headers already sent?

This PHP header error results from extra empty spaces that are not suppose to be within your files. You could have unknowingly created them when you are modifying WordPress or your Theme files.

How can I see the headers I’ve already sent?

Yup, you can use the headers_sent function. Checks if or where headers have been sent. You can’t add any more header lines using the header() function once the header block has already been sent. Using this function you can at least prevent getting HTTP header related error messages.

What can I use instead of header in php?

PHP Redirect Without Header If you have issues with the header function, you can still set up a PHP redirect with JavaScript. While the redirect might be slower using JavasScript, it will still be effective.

What does php header do?

What is header() function in PHP? The header() function is an predefined PHP native function. With header() HTTP functions we can control data sent to the client or browser by the Web server before some other output has been sent. The header function sets the headers for an HTTP Response given by the server.

What does Cannot modify header information mean?

If you encountered WordPress “Cannot modify header information” error, that means there’s something wrong with your website’s page header code.

What does the function header sent in PHP return?

Definition and Usage The header() function sends a raw HTTP header to a client. It is important to notice that the header() function must be called before any actual output is sent!