%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* For buffering accidental output caused by themes and other plugins.
* Also used in template rendering.
*/
class Loco_output_Buffer {
/**
* The output buffering level opened by this instance
* @var int usually 1 unless another buffer was opened before this one.
*/
private $ob_level;
/**
* Content buffered while our buffer was buffering
* @var string
*/
private $output = '';
/**
* @return string
*/
public function __toString(){
return $this->output;
}
/**
* @return Loco_output_Buffer
*/
public static function start(){
$buffer = new Loco_output_Buffer;
return $buffer->open();
}
/**
* @internal
* Ensure buffers closed if something terminates before we close gracefully
*/
public function __destruct(){
$this->close();
}
/**
* @return Loco_output_Buffer
*/
public function open(){
self::check();
if( ! ob_start() ){
throw new RuntimeException('Failed to start output buffering');
}
$this->ob_level = ob_get_level();
return $this;
}
/**
* @return Loco_output_Buffer
*/
public function close(){
if( is_int($this->ob_level) ){
// collect output from our nested buffers
$this->output = self::flush( $this->ob_level );
$this->ob_level = null;
}
return $this;
}
/**
* Check the current script has not produced unbuffered output
* @throws Loco_error_Exception
* @return void
*/
public static function check(){
if( headers_sent($file,$line) ){
$file = str_replace( trailingslashit( loco_constant('ABSPATH') ), '', $file );
$message = sprintf( __('Loco interrupted by output from %s:%u','loco'), $file, $line );
// @codeCoverageIgnoreStart
// There's no way to handle junk output once it's flushed. exit unpleasantly unless in test
if( ! defined('LOCO_TEST') ){
throw new Loco_error_Exception( $message );
}
// @codeCoverageIgnoreEnd
}
}
/**
* @internal
* @param int highest buffer to flush
* @return string
*/
private static function flush( $min ){
$last = -1;
$output = '';
while( $level = ob_get_level() ){
// avoid "impossible" infinite loop
// @codeCoverageIgnoreStart
if( $level === $last ){
throw new Exception('Failed to close output buffer');
}
// @codeCoverageIgnoreEnd
if( $level < $min ){
break;
}
$output .= ob_get_contents();
ob_get_clean();
$last = $level;
}
return $output;
}
/**
* Destroy all output buffers
* @return void
*/
public static function clear(){
$junk = self::flush(0);
if( $bytes = strlen($junk) ){
do_action( 'loco_buffer_cleared', $junk );
$message = sprintf("Cleared %s of buffered output", Loco_mvc_FileParams::renderBytes($bytes) );
Loco_error_AdminNotices::debug( $message );
}
}
}
Zerion Mini Shell 1.0