How to use PHP error handling function debug_backtrace()?

php debug_backtrace() function is used to generate a PHP backtrace, that is, to generate a PHP backtrace (backtrace).

Syntax:

debug_backtrace（provide_object）

Parameters:

provide_object: Specify whether to fill the object index. The type of provide_object is boolean.

Return value:

The debug_backtrace() function returns an associative array. The following list is the possible returned elements:

## functionstringThe name of the current function. lineintegerCurrent line number. filestringCurrent file name. classstringCurrent class nameobjectobjectCurrent object name. typestringargsarray

Name	Type	Description
		Specifies the current call type. is used for method calls. (returns "->") is used for static method calls. (Return "::") is used for function calls. (If nothing is returned, it is empty)
		If inside the function. (This lists the function parameters.) If in an included file. (This lists the included file names.)

Code example:

<?php
function demo($str)
{
    echo "正在学习:".$str."<br />";
    var_dump(debug_backtrace());
}
demo(&#39;php&#39;);

Output:

正在学习:php
array (size=1)
  0 => 
    array (size=4)
      'file' => string 'D:\wamp\www\test\demo.php' (length=25)
      'line' => int 7
      'function' => string 'demo' (length=4)
      'args' => 
        array (size=1)
          0 => &string 'php' (length=3)

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