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<?php
namespace W3TC;
class Util_Debug {
/**
* Returns current microtime
*
* @return double
*/
static public function microtime() {
list ( $usec, $sec ) = explode( ' ', microtime() );
return (double) $usec + (double) $sec;
}
/**
* Return full path to log file for module
* Path used in priority
* 1) W3TC_DEBUG_DIR
* 2) WP_DEBUG_LOG
* 3) W3TC_CACHE_DIR
*
* @param unknown $module
* @param null $blog_id
* @return string
*/
static public function log_filename( $module, $blog_id = null ) {
if ( is_null( $blog_id ) )
$blog_id = Util_Environment::blog_id();
$postfix = sprintf( '%06d', $blog_id );
if ( defined( 'W3TC_BLOG_LEVELS' ) ) {
for ( $n = 0; $n < W3TC_BLOG_LEVELS; $n++ )
$postfix = substr( $postfix, strlen( $postfix ) - 1 - $n, 1 ) .
'/' . $postfix;
}
$from_dir = W3TC_CACHE_DIR;
if ( defined( 'W3TC_DEBUG_DIR' ) && W3TC_DEBUG_DIR ) {
$dir_path = W3TC_DEBUG_DIR;
if ( !is_dir( W3TC_DEBUG_DIR ) )
$from_dir = dirname( W3TC_DEBUG_DIR );
} else
$dir_path = Util_Environment::cache_dir( 'log' );
$filename = $dir_path . '/' . $postfix . '/' . $module . '.log';
if ( !is_dir( dirname( $filename ) ) ) {
Util_File::mkdir_from_safe( dirname( $filename ), $from_dir );
}
return $filename;
}
static public function log( $module, $message ) {
$message = strtr( $message, '<>', '..' );
$filename = Util_Debug::log_filename( $module );
return @file_put_contents( $filename, '[' . date( 'r' ) . '] ' .
$message . "\n", FILE_APPEND );
}
/**
* Log cache purge event
*/
static public function log_purge( $module, $message, $parameters = null,
$explicit_postfix = null ) {
$backtrace = debug_backtrace( 0 );
$backtrace_lines = array();
$pos = 0;
for ( $n = 2; $n < count( $backtrace ); $n++ ) {
if ( !Util_Debug::log_purge_should_print_item( $backtrace, $n ) ) {
continue;
}
$i = $backtrace[$n];
$filename = isset( $i['file'] ) ? $i['file'] : '';
$filename = str_replace( ABSPATH, '', $filename );
$line = isset( $i['line'] ) ? $i['line'] : '';
$method = ( !empty( $i['class'] ) ? $i['class'] . '--' : '' ) .
$i['function'];
$args = ' ' . Util_Debug::encode_params( $i['args'] );
$backtrace_lines[] = "\t#" . ( $pos ) . ' ' .
$filename . '(' . $line . '): ' . $method . $args;
$pos++;
}
$message = $message;
if ( !is_null( $parameters ) ) {
$message .= Util_Debug::encode_params( $parameters );
}
$user = function_exists( 'wp_get_current_user' ) ? wp_get_current_user() : null;
$username = ( empty( $user ) ? 'anonymous' : $user->user_login );
$message .= "\n\tusername:$username";
if ( is_array( $explicit_postfix ) ) {
$message .= "\n\t" . implode( "\n\t", $explicit_postfix );
}
$message .= "\n" . implode( "\n", $backtrace_lines );
return Util_Debug::log( $module . '-purge', $message );
}
static private function log_purge_should_print_item( $backtrace, $n ) {
if ( !empty( $backtrace[$n]['class']) &&
$backtrace[$n]['class'] == 'W3TC\\CacheFlush_Locally' ) {
return false;
}
if ( !empty( $backtrace[$n]['class']) &&
$backtrace[$n]['class'] == 'WP_Hook' &&
!empty( $backtrace[$n + 1]['function'] ) ) {
$f = $backtrace[$n + 1]['function'];
if ( $f == 'do_action' || $f == 'apply_filters' ) {
return false;
}
return Util_Debug::log_purge_should_print_item( $backtrace, $n + 1 );
}
return true;
}
static private function encode_params( $args ) {
$args_strings = array();
if ( !is_array( $args ) ) {
$s = (string)$args;
if ( strlen( $s ) > 100 ) {
$s = substr( $s, 0, 98 ) . '..';
}
$args_strings[] = $s;
} else {
foreach ( $args as $arg ) {
$s = json_encode( $arg,
JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );
if ( strlen( $s ) > 100 ) {
$s = substr( $s, 0, 98 ) . '..';
}
$args_strings[] = $s;
}
}
return '(' . implode( ', ', $args_strings ) . ')';
}
}