PHP引用函数不在脚本中

Question

Can somebody please explain to me where can PHP script get this functions from, I have a PHP script that has this few lines:

<?php
$args1 = array();
$gethosts = get_xml_host_objects($args1); //grabbing internal xml data from backend

$args2 = array();
$gethoststatus = get_xml_host_status($args2);

$args3 = array();
$getparenthosts = get_xml_host_parents($args3);

So I do not understand from where and how could this PHP script be referencing those functions, could somebody just give me few examples suggestions of where to look?

Answer 1

Maybe, there is a file that includes the two scripts. Somethings like that

<?php
    include 'file_with_function.php';
    include 'your_file.php';
?>

These lines can help. Place them at the beginning of your file

echo '<pre>';  
debug_print_backtrace();  
echo '</pre>';