/**
* Start compilation
* @return string optimized source
*/
function compile($path = null)
{
// process as root script if path not passed
$isroot = is_null($path);
if ($isroot) {
$path = $this->path;
$this->incs = array();
$this->dependencies = array();
}
// compile initial source for top-level file
//
$this->inphp = false;
$this->lasttoken = null;
$src = $this->compile_php($path, null, $isroot);
// second pass to replace constants with literals if option set
//
if ($this->opt(COMPILER_OPTION_LITERALS)) {
$tokens = token_get_all($src);
$src = '';
do {
$tok = current($tokens);
$s = is_array($tok) ? $tok[1] : $tok;
if (is_array($tok) && T_STRING === $tok[0]) {
$c = $tok[1];
if (isset($this->conf_consts[$c])) {
// replace current definition with target config value
$s = var_export($this->conf_consts[$c], 1);
} else {
if (defined($c) && $this->opt(COMPILER_OPTION_LITERALS_SYS)) {
// WARNING: extension constants could differ on target environment
$s = var_export(constant($c), 1);
}
}
}
$src .= $s;
} while (next($tokens) !== false);
}
// bytecode compilation with bcompiler extension
//
if ($this->opt(COMPILER_OPTION_BYTECODE)) {
// extension can only operate on files
$srcpath = tempfile($stdin, null);
file_put_contents($srcpath, $src);
unset($src);
// run via shell due to conflict bugs in bcompiler
PLUG::exec_bin('bcompile', array($srcpath), $src);
}
return $src;
}
