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Switched to a more advanced regex to test wheter parameter is a variable

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This commit is contained in:
Simon Wisselink
2020-01-28 11:04:51 +01:00
parent 34763ae316
commit 2bf62c0976
2 changed files with 22 additions and 5 deletions
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1
change_log.txt
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@@ -1,4 +1,5 @@
- fix foreachelse on arrayiterators https://github.com/smarty-php/smarty/issues/506
- fix errors that occured where isset was replaced with null check such as https://github.com/smarty-php/smarty/issues/453
===== 3.1.34 release ===== 05.11.2019
13.01.2020

26
libs/sysplugins/smarty_internal_templatecompilerbase.php
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@@ -621,14 +621,18 @@ abstract class Smarty_Internal_TemplateCompilerBase
|| strcasecmp($name, 'array') === 0 || is_callable($name)
) {
$func_name = strtolower($name);
$par = implode(',', $parameter);
$parHasFuction = strpos($par, '(') !== false;
if ($func_name === 'isset') {
if (count($parameter) === 0) {
$this->trigger_template_error('Illegal number of parameter in "isset()"');
}
$isset_par = str_replace("')->value", "',null,true,false)->value", $par);
return '@!is_null(' . $isset_par . ')';
$pa = array();
foreach ($parameter as $p) {
$pa[] = $this->syntaxMatchesVariable($p) ? 'isset(' . $p . ')' : '(' . $p . ' !== null )';
}
return '(' . implode(' && ', $pa) . ')';
} elseif (in_array(
$func_name,
array(
@@ -645,7 +649,7 @@ abstract class Smarty_Internal_TemplateCompilerBase
$this->trigger_template_error("Illegal number of parameter in '{$func_name()}'");
}
if ($func_name === 'empty') {
if ($parHasFuction && version_compare(PHP_VERSION, '5.5.0', '<')) {
if (!$this->syntaxMatchesVariable($parameter[0]) && version_compare(PHP_VERSION, '5.5.0', '<')) {
return '(' . $parameter[ 0 ] . ' === false )';
} else {
return $func_name . '(' .
@@ -663,6 +667,18 @@ abstract class Smarty_Internal_TemplateCompilerBase
}
}
/**
* Determines whether the passed string represents a valid (PHP) variable.
* This is important, because `isset()` only works on variables and `empty()` can only be passed
* a variable prior to php5.5
* @param $string
* @return bool
*/
private function syntaxMatchesVariable($string) {
static $regex_pattern = '/^\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*((->)[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*|\[.*]*\])*$/';
return 1 === preg_match($regex_pattern, trim($string));
}
/**
* This method is called from parser to process a text content section
* - remove text from inheritance child templates as they may generate output