PHP Stacktrace to `error_log()` using `debug_backtrace()`.

debug_backtrace.php

<?php

foreach ( debug_backtrace() as $key => $value ) {

	$function = @$value['function'];

	if( isset( $value['class'] ) )
		$function = $value['class'] . '::' . $function;

	//error_log( "** " . $key . ". " . $function . "( " . str_replace( array("\n","\t",' ','(',')'), '', print_r( $value['args'], true ) ) . " )" );
	//error_log( "** " . $key . ". " . $function . "( " . implode( ', ', @$value['args'] ) . " )" );
	error_log( "** " . $key . ". " . $function . "( " . serialize( @$value['args'] ) . " )" );
	error_log( "** FILE: " . @$value['file'] . ":" . @$value['line'] );
}