bw_trace_output_buffer() – Trace anything left in the output buffer(s)

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Description

Trace anything left in the output buffer(s)

We need to test if there is anything in the output buffer before calling ob_get_flush() otherwise it produces a Notice that can get returned to a client. Calling ob_get_status() appears to help in this regard. Note: We don't cater for multiple output buffers. Artisteer 4.0 saves information in $theme_ob_stack, so we trace that in case it contains Warnings or Fatal messages.

When zlib.output_compression is on then ob_get_status() may return an array like the following. ` Array [name] => (string) "zlib output compression" [type] => (integer) 0 [flags] => (integer) 20512 [level] => (integer) 1 [chunk_size] => (integer) 16384 [buffer_size] => (integer) 20480 [buffer_used] => (integer) 3935 ` In this case should not try to call ob_get_flush() because we get another Notice, due to output handler incompatibilities. As a workaround we first check if zlib.output_compression is set in the php.ini file

Usage

bw_trace_output_buffer();

Parameters

Returns

void

Source

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

function bw_trace_output_buffer() {
  if ( ini_get( 'zlib.output_compression') ) {
    return;
  }
  //$ob = ob_get_contents();
  $status = ob_get_status();
  
  bw_trace2( $status, "output buffer status", false );
  if ( count( $status ) ) {
    $ob = ob_get_flush();
    bw_trace2( $ob, "output buffer", false );
    if ( defined( "WP_DEBUG") && WP_DEBUG ) {
      //echo "output buffer";
      //print_r( $ob );
    }
  }    
  global $theme_ob_stack;
  bw_trace2( $theme_ob_stack, "theme_ob_stack", false );
  if ( defined( "WP_DEBUG") && WP_DEBUG ) {
    //echo "theme_ob_stack";
    //print_r( $theme_ob_stack );
  }  
}
 

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