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', '..' );
$filename = self::log_filename( $module );
return @file_put_contents( $filename, '[' . gmdate( 'r' ) . '] ' . $message . "\n", FILE_APPEND ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_file_put_contents
}
/**
* Log cache purge event
*
* @param unknown $module Module.
* @param string $message Message.
* @param array $parameters Parameters.
* @param array $explicit_postfix Explicit postfix.
*
* @return bool
*/
public static function log_purge( $module, $message, $parameters = null, $explicit_postfix = null ) {
$backtrace = debug_backtrace( 0 ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_debug_backtrace
$backtrace_count = count( $backtrace );
$backtrace_lines = array();
$pos = 0;
for ( $n = 2; $n < $backtrace_count; $n++ ) {
if ( ! self::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 = ' ' . self::encode_params( $i['args'] );
$backtrace_lines[] = "\t#" . ( $pos ) . ' ' . $filename . '(' . $line . '): ' . $method . $args;
$pos++;
}
$message = $message;
if ( ! is_null( $parameters ) ) {
$message .= self::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 self::log( $module . '-purge', $message );
}
/**
* Log purge should print item
*
* @param array $backtrace Backtrace.
* @param string $n Key.
*
* @return bool
*/
private static function log_purge_should_print_item( $backtrace, $n ) {
if ( ! empty( $backtrace[ $n ]['class'] ) && 'W3TC\\CacheFlush_Locally' === $backtrace[ $n ]['class'] ) {
return false;
}
if ( ! empty( $backtrace[ $n ]['class'] ) && 'WP_Hook' === $backtrace[ $n ]['class'] && ! empty( $backtrace[ $n + 1 ]['function'] ) ) {
$f = $backtrace[ $n + 1 ]['function'];
if ( 'do_action' === $f || 'apply_filters' === $f ) {
return false;
}
return self::log_purge_should_print_item( $backtrace, $n + 1 );
}
return true;
}
/**
* Encode parameters
*
* @param array $args Arguments.
*
* @return string
*/
private static 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 ) . ')';
}
/**
* Clean debug output with label headers.
*
* @param string $label Label.
* @param array $data Data.
*
* phpcs:disable WordPress.PHP.DevelopmentFunctions.error_log_error_log
* phpcs:disable WordPress.PHP.DevelopmentFunctions.error_log_print_r
*/
public static function debug( $label, $data ) {
error_log(
"\n\n" . '===============Debug ' . $label . ' Start===============' . "\n" .
'Microtime: ' . microtime( true ) . "\n" .
'Content : ' . print_r( $data, true ) . "\n" .
'===============Debug ' . $label . ' End===============' . "\n"
);
}
/**
* Redacts the value of the _wpnonce parameter in a log line.
*
* @param string $log_line The log line containing the nonce parameter.
* @return string The log line with the nonce value redacted.
*/
public static function redact_wpnonce( string $log_line ): string {
// Regular expression to match the nonce parameter and its value.
$pattern = '/(nonce=)[^&\]]+/';
// Replace the value of nonce with "REDACTED".
$redacted_log_line = preg_replace( $pattern, '$1REDACTED', $log_line );
return $redacted_log_line;
}
}