bw_lazy_trace2() – Improved trace function that needs no parameters, but accepts two

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Description

Improved trace function that needs no parameters, but accepts two

Using debug_backtrace this function can be used to trace the parameters to a function It's a version of bw_backtrace that doesn't produce the whole call tree It's less efficient than bw_lazy_trace since it first needs to call debug_backtrace() bw_backtrace should also perform the checks.

Usage

$mixed = bw_lazy_trace2( $value, $text, $show_args, $level );

Parameters

$value

( mixed ) optional – an optional field to be traced

$text

( string ) optional – an optional field identifying text for the field to be traced

$show_args

( string ) optional default: 1 – true to display the arguments to the call

$level

( integer ) optional – trace level, optional ?

Returns

mixed $value – to allow this function to be called in return statements

Source

File name: oik-bwtrace/includes/bwtrace.php
Lines: 1 to 45 of 45

function bw_lazy_trace2( $value=null, $text=null, $show_args=true, $level=null ) {
  global $bw_trace_on;
  if ($bw_trace_on) {
    //bw_trace_check_level( $level );
    $backtrace = debug_backtrace();
    //bw_lazy_trace( $backtrace, __FUNCTION__, __LINE__, __FILE__, "backtrace" );
    $call = $backtrace[0];
    $call1 = $backtrace[1];
    $file = bw_array_get( $call1, 'file', NULL) ;
    $file = bw_trace_file_part( $file );
    $line = bw_array_get( $call1, 'line', 0 );
    if ( isset( $backtrace[2] ) ) {
      $call2 = $backtrace[2]; 
      $function = $call2['function'];
      if ( isset( $call2['class'] ) ) {
        $function = $call2['class'] . '::' . $function;
      }
      if ( $show_args ) {      
        $args = $call2['args'];
        $cargs = count( $args );
        switch ( $cargs ) {
          case 0: 
            $targs = NULL;
            break;
          case 1:
            $targs = $args[0]; 
            break;
          default:
            $targs = $args;
        }
        bw_lazy_trace( $targs, $function, $line, $file, $cargs, $level );
      }  
    } else { 
      $function = "";
    }
           
    if ( $value || $text ) {
      bw_lazy_trace( $value, $function, $line, $file, $text, $level );
    }      
    //if ( $show_args )  
    //  bw_trace_context_all( $function, $line, $file );  
  } 
  //bw_bang(); 
  return( $value );
}
 

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