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wp-phptidy.php
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#!/usr/bin/php
<?php
/**
* phptidy
*
* See README for more information.
*
* MODIFIED VERSION for TextWrangler Unix Script
* See http://wp.me/pN7Q4-72
*
* PHP version >= 5.0
*
* @copyright 2003-2008 Magnus Rosenbaum
* @license GPL v2
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* @version 2.9 (2009-01-07)
* @author Magnus Rosenbaum <[email protected]>
* @package phptidy
*/
//////////////// DEFAULT CONFIGURATION ///////////////////
// You can overwrite all these settings in your configuration files.
// List of files in your project
// Wildcards for glob() may be used.
// Example: array("*.php", "inc/*.php");
$project_files = array();
// List of files you want to exclude from the project files
// Wildcards are not allowed here.
// Example: array("inc/external_lib.php");
$project_files_excludes = array();
// The automatically added author in the phpdoc file docblocks
// If left empty no new @author doctags will be added.
// Example: "Your Name <[email protected]>"
$default_author = "";
// Name of the automatically added @package doctag in the phpdoc file docblocks
// Example: "myproject"
$default_package = "";
// String used for indenting
// If you indent with spaces you can use as much spaces as you like.
// Useful values: "\t" for indenting with tabs,
// " " for indenting with two spaces
$indent_char = "\t";
// Control structures with the opening curly brace on a new line
// Examples: false always on the same line
// true always on a new line
// array(T_CLASS, T_FUNCTION) for PEAR Coding Standards
$curly_brace_newline = false;
// PHP open tag
// All php open tags will be replaced by the here defined kind of open tag.
// Useful values: "<?", "<?php", "<?PHP"
$open_tag = "<?php";
// Check encoding
// If left empty the encoding will not be checked.
// See http://php.net/manual/en/ref.mbstring.html for a list of supported
// encodings.
// Examples: "ASCII", "UTF-8", "ISO-8859-1"
$encoding = "";
// Docroot-Variables
// phptidy will strip these variables and constants from the beginning of
// include and require commands to generate appropriate @see tags also for
// these files.
// Example: array('DOCROOT', '$docroot', '$GLOBALS[\'docroot\']');
$docrootvars = array();
// Enable the single cleanup functions
$fix_token_case = true;
$fix_builtin_functions_case = true;
$replace_inline_tabs = true;
$replace_phptags = true;
$replace_shell_comments = true;
$fix_statement_brackets = true;
$fix_separation_whitespace = true;
$fix_comma_space = true;
$fix_round_bracket_space = true;
$add_file_docblock = false;
$add_function_docblocks = false;
$add_doctags = false;
$fix_docblock_format = true;
$fix_docblock_space = false;
$add_blank_lines = false;
$indent = true;
///////////// END OF DEFAULT CONFIGURATION ////////////////
define( 'CONFIGFILE', __DIR__ . "/.phptidy-config.php" );
define( 'CACHEFILE', __DIR__ . "/.phptidy-cache" );
error_reporting( E_ALL );
if ( !version_compare( phpversion(), "5.0", ">=" ) ) {
echo "Error: phptidy requires PHP 5 or newer.\n";
exit( 1 );
}
if ( php_sapi_name() != "cli" ) {
echo "Error: phptidy has to be run on command line with CLI SAPI\n";
exit( 1 );
}
// Read command line
$command = "";
$files = array();
$options = array();
foreach ( $_SERVER['argv'] as $key => $value ) {
if ( $key==0 ) continue;
if ( $key==1 ) {
$command = $value;
continue;
}
if ( substr( $value, 0, 1 )=="-" ) {
$options[] = $value;
} else {
$files[] = $value;
}
}
// Get command
switch ( $command ) {
case "help":
case "--help":
case "-h":
usage();
exit;
case "suffix":
case "replace":
case "diff":
case "source":
case "files":
case "tokens":
break;
default:
echo "Unknown command: '".$command."'\n";
case "":
usage();
exit( 1 );
}
// Get options
$verbose = false;
foreach ( $options as $option ) {
switch ( $option ) {
case "-v":
case "--verbose":
$verbose = true;
continue 2;
}
echo "Unknown option: '".$option."'\n";
usage();
exit( 1 );
}
// Load config file
if ( file_exists( CONFIGFILE ) ) {
verbose( "Using configuration file ".CONFIGFILE."\n" );
require CONFIGFILE;
} else {
verbose( "Running without configuration file\n" );
}
// Files from config file
if ( !count( $files ) ) {
if ( !count( $project_files ) ) {
echo "Error: No files supplied on commandline and also no project files specified in config file\n";
exit( 1 );
}
foreach ( $project_files as $pf ) {
$files = array_unique( array_merge( $files, glob( $pf ) ) );
}
}
// File excludes from config file
foreach ( $project_files_excludes as $file_exclude ) {
if (
( $key = array_search( $file_exclude, $files ) ) !== false
) unset( $files[$key] );
}
// Check files
foreach ( $files as $key => $file ) {
// Ignore backups and results from phptidy
if (
substr( $file, -12 )==".phptidybak~" or
substr( $file, -12 )==".phptidy.php"
) {
unset( $files[$key] );
continue;
}
if ( !is_readable( $file ) or !is_file( $file ) ) {
echo "Error: File '".$file."' does not exist or is not readable\n";
exit( 1 );
}
}
// Show files
if ( $command=="files" ) {
print_r( $files );
exit;
}
// Read cache file
if ( file_exists( CACHEFILE ) ) {
verbose( "Using cache file ".CACHEFILE."\n" );
$cache = unserialize( file_get_contents( CACHEFILE ) );
$cache_orig = $cache;
} else {
$cache = array(
'md5sums' => array(),
);
$cache_orig = false;
}
// Find functions and includes
verbose( "Find functions and includes " );
$functions = array();
$seetags = array();
foreach ( $files as $file ) {
verbose( "." );
$source = file_get_contents( $file );
$functions = array_unique( array_merge( $functions, get_functions( $source ) ) );
find_includes( $seetags, $source, $file );
}
verbose( "\n" );
$md5sum = md5( serialize( $functions ).serialize( $seetags ) );
if ( isset( $cache['functions_seetags'] ) and $md5sum == $cache['functions_seetags'] ) {
// Use cache only if functions and seetags haven't changed
$use_cache = true;
} else {
$use_cache = false;
$cache['functions_seetags'] = $md5sum;
}
if ( !extension_loaded( "tokenizer" ) ) {
echo "Error: The 'Tokenizer' extension for PHP is missing. See http://php.net/manual/en/book.tokenizer.php for more information.\n";
exit( 1 );
}
verbose( "Process files\n" );
$replaced = 0;
foreach ( $files as $file ) {
verbose( " ".$file."\n" );
$source_orig = file_get_contents( $file );
// Cache
$md5sum = md5( $source_orig );
if ( $use_cache and isset( $cache['md5sums'][$file] ) and $md5sum == $cache['md5sums'][$file] ) {
// Original file has not changed, so we don't process it
verbose( " File unchanged since last processing.\n" );
continue;
}
// Check encoding
if ( $encoding and !mb_check_encoding( $source_orig, $encoding ) ) {
echo " File contains characters which are not valid in ".$encoding.":\n";
$source_converted = mb_convert_encoding( $source_orig, $encoding );
$tmpfile = "/tmp/tmp.phptidy.php";
if ( !file_put_contents( $tmpfile, $source_converted ) ) {
echo "Error: The temporary file '".$tmpfile."' could not be saved.\n";
exit( 1 );
}
system( "echo -ne '\\033[01;31m'; diff -u ".$file." ".$tmpfile." 2>&1; echo -ne '\\033[00m'" );
}
// Process source code
$source = $source_orig;
$count = 0;
do {
$source_in = $source;
$source = phptidy( $source_in );
++$count;
if ( $count > 3 ) {
echo " Code processed 3 times and still not consistent!\n";
break;
}
} while ( $source != $source_in );
// Processing has not changed content of file
if ( $count == 1 ) {
verbose( " Processed without changes.\n" );
// Write md5sum of the unchanged file into cache
$cache['md5sums'][$file] = $md5sum;
continue;
}
// Output
switch ( $command ) {
case "suffix":
$newfile = $file.".phptidy.php";
if ( !file_put_contents( $newfile, $source ) ) {
echo "Error: The file '".$newfile."' could not be saved.\n";
exit( 1 );
}
verbose( " ".$newfile." saved.\n" );
break;
case "replace":
$backupfile = dirname( $file ).( dirname( $file )?"/":"" ).".".basename( $file ).".phptidybak~";
if ( !copy( $file, $backupfile ) ) {
echo "Error: The file '".$backupfile."' could not be saved.\n";
exit( 1 );
}
if ( !file_put_contents( $file, $source ) ) {
echo "Error: The file '".$file."' could not be overwritten.\n";
exit( 1 );
}
verbose( " replaced.\n" );
++$replaced;
// Write new md5sum into cache
$cache['md5sums'][$file] = md5( $source );
break;
case "diff":
$tmpfile = "/tmp/tmp.phptidy.php";
if ( !file_put_contents( $tmpfile, $source ) ) {
echo "Error: The temporary file '".$tmpfile."' could not be saved.\n";
exit( 1 );
}
system( "echo -ne '\\033[01;34m'; diff -u ".$file." ".$tmpfile." 2>&1; echo -ne '\\033[00m'" );
break;
case "source":
echo $source;
break;
}
}
if ( $command=="replace" ) {
if ( $replaced ) {
verbose( "Replaced ".$replaced." files.\n" );
}
if ( $cache != $cache_orig ) {
verbose( "Write cache file ".CACHEFILE."\n" );
if ( !file_put_contents( CACHEFILE, serialize( $cache ) ) ) {
echo "Warning: The cache file '".CACHEFILE."' could not be saved.\n";
}
}
}
/////////////////// FUNCTIONS //////////////////////
/**
* Output script status messages
*/
function verbose( $msg ) {
if ( $GLOBALS['verbose'] ) echo $msg;
}
/**
* Display usage information
*/
function usage() {
echo "
Usage: phptidy.php command [files|options]
Commands:
suffix Write output into files with suffix .phptidy.php
replace Replace files and backup original as .phptidybak
diff Show diff between old and new source
source Show processed source code of affected files
files Show files that would be processed
tokens Show source file tokens
help Display this message
Options:
-v Verbose messages
If no files are supplied on command line, they will be read from the config
file.
See README and source comments for more information.
";
}
/**
* Clean up source code
*
* @param string $source
* @return string
*/
function phptidy( $source ) {
// Replace non-Unix line breaks
// http://pear.php.net/manual/en/standards.file.php
// Windows line breaks -> Unix line breaks
$source = str_replace( "\r\n", "\n", $source );
// Mac line breaks -> Unix line breaks
$source = str_replace( "\r", "\n", $source );
$tokens = get_tokens( $source );
if ( $GLOBALS['command']=="tokens" ) {
print_tokens( $tokens );
exit;
}
// Simple formatting
if ( $GLOBALS['fix_token_case'] ) fix_token_case( $tokens );
if ( $GLOBALS['fix_builtin_functions_case'] ) fix_builtin_functions_case( $tokens );
if ( $GLOBALS['replace_inline_tabs'] ) replace_inline_tabs( $tokens );
if ( $GLOBALS['replace_phptags'] ) replace_phptags( $tokens );
if ( $GLOBALS['replace_shell_comments'] ) replace_shell_comments( $tokens );
if ( $GLOBALS['fix_statement_brackets'] ) fix_statement_brackets( $tokens );
if ( $GLOBALS['fix_separation_whitespace'] ) fix_separation_whitespace( $tokens );
if ( $GLOBALS['fix_comma_space'] ) fix_comma_space( $tokens );
if ( $GLOBALS['fix_round_bracket_space'] ) fix_round_bracket_space( $tokens );
// PhpDocumentor
if ( $GLOBALS['add_doctags'] ) {
list( $usestags, $paramtags, $returntags ) = collect_doctags( $tokens );
//print_r($usestags);
//print_r($paramtags);
//print_r($returntags);
}
if ( $GLOBALS['add_file_docblock'] ) add_file_docblock( $tokens );
if ( $GLOBALS['add_function_docblocks'] ) add_function_docblocks( $tokens );
if ( $GLOBALS['add_doctags'] ) {
add_doctags( $tokens, $usestags, $paramtags, $returntags, $GLOBALS['seetags'] );
}
if ( $GLOBALS['fix_docblock_format'] ) fix_docblock_format( $tokens );
if ( $GLOBALS['fix_docblock_space'] ) fix_docblock_space( $tokens );
if ( $GLOBALS['add_blank_lines'] ) add_blank_lines( $tokens );
// Indenting
if ( $GLOBALS['indent'] ) {
indent( $tokens );
strip_closetag_indenting( $tokens );
}
$source = combine_tokens( $tokens );
// Strip trailing whitespace
$source = preg_replace( "/[ \t]+\n/", "\n", $source );
if ( substr( $source, -1 )!="\n" ) {
// Add one line break at the end of the file
// http://pear.php.net/manual/en/standards.file.php
$source .= "\n";
} else {
// Strip empty lines at the end of the file
while ( substr( $source, -2 )=="\n\n" ) $source = substr( $source, 0, -1 );
}
return $source;
}
//////////////// TOKEN FUNCTIONS ///////////////////
/**
* Returns the text part of a token
*
* @param mixed $token
* @return string
*/
function token_text( $token ) {
if ( is_string( $token ) ) return $token;
return $token[1];
}
/**
* Prints all tokens
*
* @param array $tokens
*/
function print_tokens( $tokens ) {
foreach ( $tokens as $token ) {
if ( is_string( $token ) ) {
echo $token."\n";
} else {
list( $id, $text ) = $token;
echo token_name( $id )." ".addcslashes( $text, "\0..\40!@\@\177..\377" )."\n";
}
}
}
/**
* Wrapper for token_get_all(), because there is new mysterious index 2 ...
*
* @param string $source
* @return array
*/
function get_tokens( &$source ) {
$tokens = token_get_all( $source );
foreach ( $tokens as &$token ) {
if ( isset( $token[2] ) ) unset( $token[2] );
}
return $tokens;
}
/**
* Combines the tokens to the source code
*
* @param array $tokens
* @return string
*/
function combine_tokens( $tokens ) {
$out = "";
foreach ( $tokens as $key => $token ) {
if ( is_string( $token ) ) {
$out .= $token;
} else {
$out .= $token[1];
}
}
return $out;
}
/**
* Displays a possible syntax error
*
* @param array $tokens
* @param integer $key
* @param string $message (optional)
*/
function possible_syntax_error( $tokens, $key, $message="" ) {
echo "Possible syntax error detected";
if ( $message ) echo " (".$message.")";
echo ":\n";
echo combine_tokens( array_slice( $tokens, max( 0, $key-5 ), 10 ) )."\n";
}
/**
* Removes whitespace from the beginning of a token array
*
* @param array $tokens
*/
function tokens_ltrim( &$tokens ) {
while (
isset( $tokens[0][0] ) and
$tokens[0][0] === T_WHITESPACE
) {
array_splice( $tokens, 0, 1 );
}
}
/**
* Removes whitespace from the end of a token array
*
* @param array $tokens (reference)
*/
function tokens_rtrim( &$tokens ) {
while (
isset( $tokens[$k=count( $tokens )-1][0] ) and
$tokens[$k][0] === T_WHITESPACE
) {
array_splice( $tokens, -1 );
}
}
/**
* Removes all whitespace
*
* @param array $tokens (reference)
*/
function strip_whitespace( &$tokens ) {
foreach ( $tokens as $key => $token ) {
if (
isset( $token[0] ) and
$token[0] === T_WHITESPACE
) {
unset( $tokens[$key] );
}
}
$tokens = array_values( $tokens );
}
/**
* Gets the argument of a statement
*
* @param array $tokens
* @param integer $key Key of the token of the command for which we want the argument
* @return array
*/
function get_argument_tokens( &$tokens, $key ) {
$tokens_arg = array();
$round_braces_count = 0;
$curly_braces_count = 0;
++$key;
while ( isset( $tokens[$key] ) ) {
$token = &$tokens[$key];
if ( is_string( $token ) ) {
if ( $token === ";" ) break;
} else {
if ( $token[0] === T_CLOSE_TAG ) break;
}
if ( $token === "(" ) {
++$round_braces_count;
} elseif ( $token === ")" ) {
--$round_braces_count;
} elseif (
$token === "{" or (
is_array( $token ) and (
$token[0] === T_CURLY_OPEN or
$token[0] === T_DOLLAR_OPEN_CURLY_BRACES
)
)
) {
++$curly_braces_count;
} elseif ( $token === "}" ) {
--$curly_braces_count;
}
if ( $round_braces_count < 0 or $round_braces_count < 0 ) break;
$tokens_arg[] = $token;
++$key;
}
return $tokens_arg;
}
//////////////// FORMATTING FUNCTIONS ///////////////////
/**
* Checks for some tokens which must not be touched
*
* @param array $token
* @return boolean
*/
function token_is_taboo( &$token ) {
return (
// Do not touch HTML content
$token[0] === T_INLINE_HTML or
$token[0] === T_CLOSE_TAG or
// Do not touch the content of strings
$token[0] === T_CONSTANT_ENCAPSED_STRING or
$token[0] === T_ENCAPSED_AND_WHITESPACE or
// Do not touch the content of multiline comments
( $token[0] === T_COMMENT and substr( $token[1], 0, 2 ) === "/*" )
);
}
/**
* Converts commands to lower case
*
* @param array $tokens (reference)
*/
function fix_token_case( &$tokens ) {
static $lower_case_tokens = array(
T_ABSTRACT,
T_ARRAY,
T_ARRAY_CAST,
T_AS,
T_BOOL_CAST,
T_BREAK,
T_CASE,
T_CATCH,
T_CLASS,
T_CLONE,
T_CONST,
T_CONTINUE,
T_DECLARE,
T_DEFAULT,
T_DO,
T_DOUBLE_CAST,
T_ECHO,
T_ELSE,
T_ELSEIF,
T_EMPTY,
T_ENDDECLARE,
T_ENDFOR,
T_ENDFOREACH,
T_ENDIF,
T_ENDSWITCH,
T_ENDWHILE,
T_EVAL,
T_EXIT,
T_EXTENDS,
T_FINAL,
T_FOR,
T_FOREACH,
T_FUNCTION,
T_GLOBAL,
T_IF,
T_IMPLEMENTS,
T_INCLUDE,
T_INCLUDE_ONCE,
T_INSTANCEOF,
T_INT_CAST,
T_INTERFACE,
T_ISSET,
T_LIST,
T_LOGICAL_AND,
T_LOGICAL_OR,
T_LOGICAL_XOR,
T_NEW,
T_OBJECT_CAST,
T_PRINT,
T_PRIVATE,
T_PUBLIC,
T_PROTECTED,
T_REQUIRE,
T_REQUIRE_ONCE,
T_RETURN,
T_STATIC,
T_STRING_CAST,
T_SWITCH,
T_THROW,
T_TRY,
T_UNSET,
T_UNSET_CAST,
T_VAR,
T_WHILE
);
foreach ( $tokens as &$token ) {
if ( is_string( $token ) ) continue;
if ( $token[1] === strtolower( $token[1] ) ) continue;
if ( in_array( $token[0], $lower_case_tokens ) ) {
$token[1] = strtolower( $token[1] );
}
}
}
/**
* Converts builtin functions to lower case
*
* @param array $tokens (reference)
*/
function fix_builtin_functions_case( &$tokens ) {
static $defined_internal_functions = false;
if ( $defined_internal_functions === false ) {
$defined_functions = get_defined_functions();
$defined_internal_functions = $defined_functions['internal'];
}
foreach ( $tokens as $key => &$token ) {
if (
is_string( $token ) or
$token[0] !== T_STRING or
!isset( $tokens[$key+2] ) or
// Ignore object methods
( is_array( $tokens[$key-1] ) and $tokens[$key-1][0] === T_OBJECT_OPERATOR )
) continue;
if (
$tokens[$key+1] === "("
) {
$lowercase = strtolower( $token[1] );
if (
$token[1] !== $lowercase and
in_array( $lowercase, $defined_internal_functions )
) {
$token[1] = $lowercase;
}
} elseif (
$tokens[$key+2] === "(" and
is_array( $tokens[$key+1] ) and $tokens[$key+1][0] === T_WHITESPACE
) {
if (
in_array( strtolower( $token[1] ), $defined_internal_functions )
) {
$token[1] = strtolower( $token[1] );
// Remove whitespace between function name and opening round bracket
unset( $tokens[$key+1] );
}
}
}
$tokens = array_values( $tokens );
}
/**
* Replaces inline tabs with spaces
*
* @param array $tokens (reference)
*/
function replace_inline_tabs( &$tokens ) {
foreach ( $tokens as &$token ) {
if ( is_string( $token ) ) {
$text =& $token;
} else {
if ( token_is_taboo( $token ) ) continue;
$text =& $token[1];
}
// Replace one tab with one space
$text = str_replace( "\t", " ", $text );
}
}
/**
* Replaces PHP-Open-Tags with consistent tags
*
* @param array $tokens (reference)
*/
function replace_phptags( &$tokens ) {
foreach ( $tokens as $key => &$token ) {
if ( is_string( $token ) ) continue;
switch ( $token[0] ) {
case T_OPEN_TAG:
// The open tag is already the right one
if ( rtrim( $token[1] ) == $GLOBALS['open_tag'] ) continue;
// Collect following whitespace
preg_match( "/\s*$/", $token[1], $matches );
$whitespace = $matches[0];
if ( $tokens[$key+1][0] === T_WHITESPACE ) {
$whitespace .= $tokens[$key+1][1];
array_splice( $tokens, $key+1, 1 );
}
if ( $GLOBALS['open_tag']=="<?" ) {
// Short open tags have the following whitespace in a seperate token
array_splice( $tokens, $key, 1, array(
array( T_OPEN_TAG, $GLOBALS['open_tag'] ),
array( T_WHITESPACE, $whitespace )
) );
} else {
// Long open tags have the following whitespace included in the token string
switch ( strlen( $whitespace ) ) {
case 0:
// Add an additional space if no whitespace is found
$whitespace = " ";
case 1:
// Use the one found space or newline
$tokens[$key][1] = $GLOBALS['open_tag'].$whitespace;
break;
default:
// Use the first space or newline for the open tag and append the rest of the whitespace as a seperate token
array_splice( $tokens, $key, 1, array(
array( T_OPEN_TAG, $GLOBALS['open_tag'].substr( $whitespace, 0, 1 ) ),
array( T_WHITESPACE, substr( $whitespace, 1 ) )
) );
}
}
break;
case T_OPEN_TAG_WITH_ECHO:
// If we use short tags we also accept the echo tags
if ( $GLOBALS['open_tag']=="<?" ) continue;
if ( $tokens[$key+1][0] === T_WHITESPACE ) {
// If there is already whitespace following we only replace the open tag
array_splice( $tokens, $key, 1, array(
array( T_OPEN_TAG, $GLOBALS['open_tag']." " ),
array( T_ECHO, "echo" )
) );
} else {
// If there is no whitespace following we add one space
array_splice( $tokens, $key, 1, array(
array( T_OPEN_TAG, $GLOBALS['open_tag']." " ),
array( T_ECHO, "echo" ),
array( T_WHITESPACE, " " )
) );
}
}
}
}
/**
* Replaces shell style comments with C style comments
*
* http://pear.php.net/manual/en/standards.comments.php
*
* @param array $tokens (reference)
*/
function replace_shell_comments( &$tokens ) {
foreach ( $tokens as &$token ) {
if ( is_string( $token ) ) continue;
if (
$token[0] === T_COMMENT and
substr( $token[1], 0, 1 ) === "#"
) {
$token[1] = "//".substr( $token[1], 1 );
}
}
}
/**
* Enforces statements without brackets and fixes whitespace
*
* http://pear.php.net/manual/en/standards.including.php
*
* @param array $tokens (reference)
*/
function fix_statement_brackets( &$tokens ) {
static $statement_tokens = array(
T_INCLUDE,
T_INCLUDE_ONCE,
T_REQUIRE,
T_REQUIRE_ONCE,
T_RETURN,
T_BREAK,
T_CONTINUE,
T_ECHO
);
foreach ( $tokens as $key => &$token ) {
if ( is_string( $token ) or !in_array( $token[0], $statement_tokens ) ) continue;
$tokens_arg = get_argument_tokens( $tokens, $key );
$tokens_arg_orig = $tokens_arg;
tokens_ltrim( $tokens_arg );
if ( !count( $tokens_arg ) or $tokens_arg[0] !== "(" ) continue;
tokens_rtrim( $tokens_arg );
// Check if the opening bracket has a matching one at the end of the expression
$round_braces_count = 0;
foreach ( $tokens_arg as $k => $t ) {
if ( is_string( $t ) ) {
if ( $t === "(" ) ++$round_braces_count;
elseif ( $t === ")" ) --$round_braces_count;
else continue;
// Check if the expression begins without a bracket or if the bracket was closed before the end of the expression was reached
if ( $round_braces_count == 0 and $k != count( $tokens_arg )-1 ) {
continue 2;
}
if ( $round_braces_count < 0 ) {
possible_syntax_error( $tokens, $key, "Closing round bracket found which has not been opened" );