minor symfony#14097 [2.3] Static Code Analysis for Components (kalessil)

This PR was squashed before being merged into the 2.3 branch (closes symfony#14097).

Discussion
----------

[2.3] Static Code Analysis for Components

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Static Code Analysis with Php Inspections (EA Extended), no functional changes:
- array_keys/array_values usage as foreach array
- foreach value by reference - added unsets to keep scope clear
- strstr usage as strpos fixed
- array_push miss-use resolved

Commits
-------

78cc93c [2.3] Static Code Analysis for Components

Author: fabpot

src/Symfony/Component/BrowserKit/Cookie.php

@@ -93,6 +93,7 @@ public function __toString()
             $dateTime = \DateTime::createFromFormat('U', $this->expires, new \DateTimeZone('GMT'));
 
             if ($dateTime === false) {
+                // this throw will provoke PHP fatal
                 throw new \UnexpectedValueException(sprintf('The cookie expiration time "%s" is not valid.'), $this->expires);
             }
 

src/Symfony/Component/Console/Descriptor/ApplicationDescription.php

@@ -144,9 +144,11 @@ private function sortCommands(array $commands)
         }
         ksort($namespacedCommands);
 
-        foreach ($namespacedCommands as &$commands) {
-            ksort($commands);
+        foreach ($namespacedCommands as &$commandsSet) {
+            ksort($commandsSet);
         }
+        // unset reference to keep scope clear
+        unset($commandsSet);
 
         return $namespacedCommands;
     }

src/Symfony/Component/Console/Helper/DialogHelper.php

@@ -71,7 +71,7 @@ public function select(OutputInterface $output, $question, $choices, $default =
                 if (empty($choices[$value])) {
                     throw new \InvalidArgumentException(sprintf($errorMessage, $value));
                 }
-                array_push($multiselectChoices, $value);
+                $multiselectChoices[] = $value;
             }
 
             if ($multiselect) {

src/Symfony/Component/Console/Helper/TableHelper.php

@@ -148,7 +148,7 @@ public function addRow(array $row)
         reset($this->rows);
 
         foreach ($row as $key => $cellValue) {
-            if (!strstr($cellValue, "\n")) {
+            if (false === strpos($cellValue, "\n")) {
                 continue;
             }
 

src/Symfony/Component/DependencyInjection/Compiler/ResolveDefinitionTemplatesPass.php

@@ -39,7 +39,7 @@ public function process(ContainerBuilder $container)
         $this->compiler = $container->getCompiler();
         $this->formatter = $this->compiler->getLoggingFormatter();
 
-        foreach (array_keys($container->getDefinitions()) as $id) {
+        foreach ($container->getDefinitions() as $id => $definition) {
             // yes, we are specifically fetching the definition from the
             // container to ensure we are not operating on stale data
             $definition = $container->getDefinition($id);

src/Symfony/Component/DependencyInjection/Container.php

@@ -312,7 +312,7 @@ public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE
                 }
 
                 $alternatives = array();
-                foreach (array_keys($this->services) as $key) {
+                foreach ($this->services as $key => $associatedService) {
                     $lev = levenshtein($id, $key);
                     if ($lev <= strlen($id) / 3 || false !== strpos($key, $id)) {
                         $alternatives[] = $key;

src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php

@@ -304,7 +304,7 @@ private function validate($content, $file)
             throw new InvalidArgumentException(sprintf('The service file "%s" is not valid. It should contain an array. Check your YAML syntax.', $file));
         }
 
-        foreach (array_keys($content) as $namespace) {
+        foreach ($content as $namespace => $data) {
             if (in_array($namespace, array('imports', 'parameters', 'services'))) {
                 continue;
             }

src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php

@@ -98,7 +98,7 @@ public function get($name)
             }
 
             $alternatives = array();
-            foreach (array_keys($this->parameters) as $key) {
+            foreach ($this->parameters as $key => $parameterValue) {
                 $lev = levenshtein($name, $key);
                 if ($lev <= strlen($name) / 3 || false !== strpos($key, $name)) {
                     $alternatives[] = $key;

src/Symfony/Component/DomCrawler/Link.php

@@ -163,7 +163,7 @@ protected function canonicalizePath($path)
             if ('..' === $segment) {
                 array_pop($output);
             } elseif ('.' !== $segment) {
-                array_push($output, $segment);
+                $output[] = $segment;
             }
         }
 

src/Symfony/Component/EventDispatcher/ContainerAwareEventDispatcher.php

@@ -124,7 +124,7 @@ public function hasListeners($eventName = null)
     public function getListeners($eventName = null)
     {
         if (null === $eventName) {
-            foreach (array_keys($this->listenerIds) as $serviceEventName) {
+            foreach ($this->listenerIds as $serviceEventName => $args) {
                 $this->lazyLoad($serviceEventName);
             }
         } else {