bw_lazy_backtrace() – print a backtrace to help find out where something is called from and how to debug it

Description

print a backtrace to help find out where something is called from and how to debug it

The output from debug_backtrace() is an array – from 0 to n of the calls

• [file] is the file name
• [line] is the line number
• [function] is the method used to get the file: include, require_once
• [args] are parameters
• [class]
• [object]
• [type] -> = method call, :: = static method call, nothing for function call

C:\apache\htdocs\wordpress\wp-content\themes\hsoh0922bp\functions.php(12:0) 2011-09-27T16:22:49+00:00   backtrace Array 
( 
[0] => Array 
( 
[file] => C:\apache\htdocs\wordpress\wp-settings.php 
[line] => 280 
[function] => include 
) 

[1] => Array 
( 
[file] => C:\apache\htdocs\wordpress\wp-config.php 
[line] => 130 
[args] => Array 
( 
[0] => C:\apache\htdocs\wordpress\wp-settings.php 
) 

[function] => require_once 
) 

[2] => Array 
( 
[file] => C:\apache\htdocs\wordpress\wp-load.php 
[line] => 29 
[args] => Array 
( 
[0] => C:\apache\htdocs\wordpress\wp-config.php 
) 

[function] => require_once 
) 

[3] => Array 
( 
[file] => C:\apache\htdocs\wordpress\wp-blog-header.php 
[line] => 12 
[args] => Array 
( 
[0] => C:\apache\htdocs\wordpress\wp-load.php 
) 

[function] => require_once 
) 

[4] => Array 
( 
[file] => C:\apache\htdocs\wordpress\index.php 
[line] => 17 
[args] => Array 
( 
[0] => C:\apache\htdocs\wordpress\wp-blog-header.php 
) 

[function] => require 
) 

) 

Usage

bw_lazy_backtrace();

Parameters

Returns

void

Source

File name: oik-bwtrace/includes/bwtrace.php
Lines:

function bw_lazy_backtrace() {
  global $bw_trace_on;
  if ($bw_trace_on) {
    $backtrace = debug_backtrace();
    //bw_trace( $backtrace, __FUNCTION__, __LINE__, __FILE__, "backtrace" );
    $file = "";
    foreach ( $backtrace as $i => $call ) {
      $function = $call['function'];
      $file = bw_array_get( $call, 'file', $file ) ;
      $file = bw_trace_file_part( $file );
      $line = bw_array_get( $call, 'line', 0 );
      $args = bw_array_get( $call, 'args', array() );
      $cargs = count( $args );
      switch ( $cargs ) {
        case 0: 
          $targs = NULL;
          break;
        //case 1:
          //$targs = $args[0]; 
          //if ( strpos( " require require_once include include_once ", $function ) ) {
            $function .= "(".$targs.")";
          //}  
          //break;
        default:
          $targs = $args;
          $sep = '(';
          foreach ( $targs as $targ ) {
            if ( is_object( $targ ) ) {
              $function .= $sep."object";
            } elseif ( is_array( $targ ) ) {
              $function .= $sep."array";
            } elseif ( is_scalar( $targ ) ) {
              $function.=$sep . $targ;
            } elseif ( is_null( $targ) ) {
        $function.=$sep.'null';
      } else {
        $function .= $sep."unsupported" ;
            }  
            $sep = ',';
          }
          $function .= ')';  
      }
      // This produces far too much      
      //bw_trace( $targs, $function, $line, $file, $i );
      // this is not much better
      //bw_trace( $i, $function, $line, $file, "backtrace" );
      
      /*
0.0018 467368 1. {main}() C:\apache\htdocs\wordpress\wp-admin\options-general.php:0 
0.0033 561816 2. require_once('C:\apache\htdocs\wordpress\wp-admin\admin.php') C:\apache\htdocs\wordpress\wp-admin\options-general.php:10 
0.0040 578248 3. require_once('C:\apache\htdocs\wordpress\wp-load.php') C:\apache\htdocs\wordpress\wp-admin\admin.php:30 
      */ 
      $line = "$i. $function $file:$line $cargs\n";
      bw_trace_log( $line ); 
    }
  }
} 
 

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