How to hide echo output results in php

php solution to hide echo output results: first open the corresponding PHP file; then check the ajax request; finally hide the echo through "if(!empty($_SERVER['HTTP_X_REQUESTED_WITH'])..." Just output the result.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

Specific questions:

Sending data from php script to javascript function

echo json_encode($rows);

When the page loads, I am running the php script and then the output is displayed on the page which is actually what I don't want to display .I tried hiding the echo with ob_end_clean(), but that seemed to break everything.

Solution:

You can check the ajax request like this

/* AJAX check  */    
if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) &&    
strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {    
/* your ajax here code will go here */    
header('Content-type: application/json');    
echo json_encode($rows);    
exit();    
}    
//non ajax code ...    
...

echo will only run if it is an AJAX call

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