php_check_syntax
(PHP 5 <= 5.0.4)
php_check_syntax — Проверяет (и запускает) PHP синтаксис указанного файла
Описание
$filename
[, string &$error_message
] )
Выполняет проверку синтаксиса (производит верификацию) файла,
указанного в filename проверяя ошибки в коде.
Действие похоже на использование php -l
из командной строки,
исключая то, что эта функция запустит (но не выведет) проверяемый
файл из filename.
К примеру, если функция определена в filename,
то эта функция будет доступна после в файле, из которого производится
запуск функции php_check_syntax(), но вывод из
файла, указанного в filename будет невозможен.
Замечание:
По техническим причинам эта функция устарела и удалена из PHP. Вместо этой функции используйте php -l somefile.php из командной строки.
Список параметров
-
filename -
Имя проверяемого файла.
-
error_message -
Если используется параметр
error_message, то в нем будет содержаться сообщение об ошибке, сформированное при проверке синтаксиса.error_messageпередается по ссылке.
Возвращаемые значения
Возвращает TRUE если проверка пройдена, и FALSE если возникла
ошибка или файл из filename недоступен.
Список изменений
| Версия | Описание |
|---|---|
| 5.0.5 | Эта функция была удалена из PHP. |
| 5.0.3 | Вызов функции exit() после php_check_syntax() передает результат в Segfault. |
| 5.0.1 |
error_message передается по ссылке.
|
Примеры
php -l somefile.php
Результатом выполнения данного примера будет что-то подобное:
PHP Parse error: unexpected T_STRING in /tmp/somefile.php on line 81
Смотрите также
- include - include
- is_readable() - Определяет существование файла и доступен ли он для чтения
Коментарии
While developing an app where I have to include PHP files written by a user, I came across the following problem:
I used "php -l somefile.php" to check the syntax of the file I was about to include and if it passed, I would include it - so far so good. But in some test cases, the file I was including would have other includes/requires inside it. If one of these was invalid, then I would still get the parse error that I was trying to avoid.
I got round it using this:
<?php
function CheckSyntax($fileName, $checkIncludes = true)
{
// If it is not a file or we can't read it throw an exception
if(!is_file($fileName) || !is_readable($fileName))
throw new Exception("Cannot read file ".$fileName);
// Sort out the formatting of the filename
$fileName = realpath($fileName);
// Get the shell output from the syntax check command
$output = shell_exec('php -l "'.$fileName.'"');
// Try to find the parse error text and chop it off
$syntaxError = preg_replace("/Errors parsing.*$/", "", $output, -1, $count);
// If the error text above was matched, throw an exception containing the syntax error
if($count > 0)
throw new Exception(trim($syntaxError));
// If we are going to check the files includes
if($checkIncludes)
{
foreach(GetIncludes($fileName) as $include)
{
// Check the syntax for each include
CheckSyntax($include);
}
}
}
function GetIncludes($fileName)
{
// NOTE that any file coming into this function has already passed the syntax check, so
// we can assume things like proper line terminations
$includes = array();
// Get the directory name of the file so we can prepend it to relative paths
$dir = dirname($fileName);
// Split the contents of $fileName about requires and includes
// We need to slice off the first element since that is the text up to the first include/require
$requireSplit = array_slice(preg_split('/require|include/i', file_get_contents($fileName)), 1);
// For each match
foreach($requireSplit as $string)
{
// Substring up to the end of the first line, i.e. the line that the require is on
$string = substr($string, 0, strpos($string, ";"));
// If the line contains a reference to a variable, then we cannot analyse it
// so skip this iteration
if(strpos($string, "$") !== false)
continue;
// Split the string about single and double quotes
$quoteSplit = preg_split('/[\'"]/', $string);
// The value of the include is the second element of the array
// Putting this in an if statement enforces the presence of '' or "" somewhere in the include
// includes with any kind of run-time variable in have been excluded earlier
// this just leaves includes with constants in, which we can't do much about
if($include = $quoteSplit[1])
{
// If the path is not absolute, add the dir and separator
// Then call realpath to chop out extra separators
if(strpos($include, ':') === FALSE)
$include = realpath($dir.DIRECTORY_SEPARATOR.$include);
array_push($includes, $include);
}
}
return $includes;
}
?>
This checks as many of the includes inside the file as it possibly can without executing anything.
I've given it some thought and rewritten my function to take full advantage of the CLI -l option (that's lower L). It requires that you enable error reporting via your own php.ini file (which you should edit the function to apply) otherwise the return result is a worthless "Error parsing".
Anyway, I hope this is useful for someone. I'm sure it could use improvement, so use at your own risk. Demo here:
http://kevinpeno.com/projects/php_syntax_check.php
<?php
/**
* Check Syntax
* Performs a Syntax check within a php script, without killing the parser (hopefully)
* Do not use this with PHP 5 <= PHP 5.0.4, or rename this function.
*
* @params string PHP to be evaluated
* @return array Parse error info or true for success
**/
function php_check_syntax( $php, $isFile=false )
{
# Get the string tokens
$tokens = token_get_all( '<?php '.trim( $php ));
# Drop our manually entered opening tag
array_shift( $tokens );
token_fix( $tokens );
# Check to see how we need to proceed
# prepare the string for parsing
if( isset( $tokens[0][0] ) && $tokens[0][0] === T_OPEN_TAG )
$evalStr = $php;
else
$evalStr = "<?php\n{$php}?>";
if( $isFile OR ( $tf = tempnam( NULL, 'parse-' ) AND file_put_contents( $tf, $php ) !== FALSE ) AND $tf = $php )
{
# Prevent output
ob_start();
system( 'C:\inetpub\PHP\5.2.6\php -c "'.dirname(__FILE__).'/php.ini" -l < '.$php, $ret );
$output = ob_get_clean();
if( $ret !== 0 )
{
# Parse error to report?
if( (bool)preg_match( '/Parse error:\s*syntax error,(.+?)\s+in\s+.+?\s*line\s+(\d+)/', $output, $match ) )
{
return array(
'line' => (int)$match[2],
'msg' => $match[1]
);
}
}
return true;
}
return false;
}
//fixes related bugs: 29761, 34782 => token_get_all returns <?php NOT as T_OPEN_TAG
function token_fix( &$tokens ) {
if (!is_array($tokens) || (count($tokens)<2)) {
return;
}
//return of no fixing needed
if (is_array($tokens[0]) && (($tokens[0][0]==T_OPEN_TAG) || ($tokens[0][0]==T_OPEN_TAG_WITH_ECHO)) ) {
return;
}
//continue
$p1 = (is_array($tokens[0])?$tokens[0][1]:$tokens[0]);
$p2 = (is_array($tokens[1])?$tokens[1][1]:$tokens[1]);
$p3 = '';
if (($p1.$p2 == '<?') || ($p1.$p2 == '<%')) {
$type = ($p2=='?')?T_OPEN_TAG:T_OPEN_TAG_WITH_ECHO;
$del = 2;
//update token type for 3rd part?
if (count($tokens)>2) {
$p3 = is_array($tokens[2])?$tokens[2][1]:$tokens[2];
$del = (($p3=='php') || ($p3=='='))?3:2;
$type = ($p3=='=')?T_OPEN_TAG_WITH_ECHO:$type;
}
//rebuild erroneous token
$temp = array($type, $p1.$p2.$p3);
if (version_compare(phpversion(), '5.2.2', '<' )===false)
$temp[] = isset($tokens[0][2])?$tokens[0][2]:'unknown';
//rebuild
$tokens[1] = '';
if ($del==3) $tokens[2]='';
$tokens[0] = $temp;
}
return;
}
?>