Remove upper bound PHP version checks from platform-check as there is not enough value added and it risks causing issues

src/Composer/Autoload/AutoloadGenerator.php

@@ -316,7 +316,13 @@ EOF;
         $filesystem->filePutContentsIfModified($targetDir.'/autoload_static.php', $this->getStaticFile($suffix, $targetDir, $vendorPath, $basePath, $staticPhpVersion));
         $checkPlatform = $config->get('platform-check');
         if ($checkPlatform) {
-            $filesystem->filePutContentsIfModified($targetDir.'/platform_check.php', $this->getPlatformCheck($packageMap));
+            $platformCheckContent = $this->getPlatformCheck($packageMap);
+            if (null === $platformCheckContent) {
+                $checkPlatform = false;
+            }
+        }
+        if ($checkPlatform) {
+            $filesystem->filePutContentsIfModified($targetDir.'/platform_check.php', $platformCheckContent);
         } elseif (file_exists($targetDir.'/platform_check.php')) {
             unlink($targetDir.'/platform_check.php');
         }
@@ -572,7 +578,6 @@ EOF;
     protected function getPlatformCheck($packageMap)
     {
         $lowestPhpVersion = Bound::zero();
-        $highestPhpVersion = Bound::positiveInfinity();
         $requiredExtensions = array();
         $extensionProviders = array();
 
@@ -592,9 +597,6 @@ EOF;
                     if ($constraint->getLowerBound()->compareTo($lowestPhpVersion, '>')) {
                         $lowestPhpVersion = $constraint->getLowerBound();
                     }
-                    if ($constraint->getUpperBound()->compareTo($highestPhpVersion, '<')) {
-                        $highestPhpVersion = $constraint->getUpperBound();
-                    }
                 }
 
                 if (preg_match('{^ext-(.+)$}iD', $link->getTarget(), $match)) {
@@ -648,22 +650,15 @@ EOF;
             return implode('.', $chunks);
         };
 
-        $requiredPhp = array();
+        $requiredPhp = '';
-        $requiredPhpError = array();
+        $requiredPhpError = '';
         if (!$lowestPhpVersion->isZero()) {
             $operator = $lowestPhpVersion->isInclusive() ? '>=' : '>';
-            $requiredPhp[] = 'PHP_VERSION_ID '.$operator.' '.$formatToPhpVersionId($lowestPhpVersion);
+            $requiredPhp = 'PHP_VERSION_ID '.$operator.' '.$formatToPhpVersionId($lowestPhpVersion);
-            $requiredPhpError[] = '"'.$operator.' '.$formatToHumanReadable($lowestPhpVersion).'"';
+            $requiredPhpError = '"'.$operator.' '.$formatToHumanReadable($lowestPhpVersion).'"';
-        }
-        if (!$highestPhpVersion->isPositiveInfinity()) {
-            $operator = $highestPhpVersion->isInclusive() ? '<=' : '<';
-            $requiredPhp[] = 'PHP_VERSION_ID '.$operator.' '.$formatToPhpVersionId($highestPhpVersion);
-            $requiredPhpError[] = '"'.$operator.' '.$formatToHumanReadable($highestPhpVersion).'"';
         }
 
         if ($requiredPhp) {
-            $requiredPhp = implode(' && ', $requiredPhp);
-            $requiredPhpError = implode(' and ', $requiredPhpError);
             $requiredPhp = <<<PHP_CHECK
 
 if (!($requiredPhp)) {
@@ -671,8 +666,6 @@ if (!($requiredPhp)) {
 }
 
 PHP_CHECK;
-        } else {
-            $requiredPhp = '';
         }
 
         $requiredExtensions = implode('', $requiredExtensions);
@@ -688,6 +681,10 @@ if (\$missingExtensions) {
 EXT_CHECKS;
         }
 
+        if (!$requiredPhp && !$requiredExtensions) {
+            return null;
+        }
+
         return <<<PLATFORM_CHECK
 <?php
 

tests/Composer/Test/Autoload/AutoloadGeneratorTest.php

@@ -1667,7 +1667,13 @@ EOF;
 
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', true, '_1');
 
-        $this->assertFileContentEquals(__DIR__ . '/Fixtures/platform/' . $expectedFixture . '.php', $this->vendorDir . '/composer/platform_check.php');
+        if (null === $expectedFixture) {
+            $this->assertFalse(file_exists($this->vendorDir . '/composer/platform_check.php'));
+            $this->assertNotContains("require __DIR__ . '/platform_check.php';", file_get_contents($this->vendorDir.'/composer/autoload_real.php'));
+        } else {
+            $this->assertFileContentEquals(__DIR__ . '/Fixtures/platform/' . $expectedFixture . '.php', $this->vendorDir . '/composer/platform_check.php');
+            $this->assertContains("require __DIR__ . '/platform_check.php';", file_get_contents($this->vendorDir.'/composer/autoload_real.php'));
+        }
     }
 
     public function platformCheckProvider()
@@ -1687,7 +1693,7 @@ EOF;
                 array(
                     new Link('a', 'php', $versionParser->parseConstraints('< 8')),
                 ),
-                'no_php_lower_bound'
+                null
             ),
             'No PHP upper bound' => array(
                 array(

tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitFilesAutoloadOrder
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitFilesAutoloadOrder', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoloadOrder', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitFilesAutoload
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitFilesAutoload
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitFilesAutoload
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitIncludePath
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitIncludePath', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitIncludePath', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php

@@ -22,8 +22,6 @@ class ComposerAutoloaderInitTargetDir
             return self::$loader;
         }
 
-        require __DIR__ . '/platform_check.php';
-
         spl_autoload_register(array('ComposerAutoloaderInitTargetDir', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitTargetDir', 'loadClassLoader'));

tests/Composer/Test/Autoload/Fixtures/platform/no_extensions_required.php

@@ -4,8 +4,8 @@
 
 $issues = array();
 
-if (!(PHP_VERSION_ID >= 70200 && PHP_VERSION_ID < 80000)) {
+if (!(PHP_VERSION_ID >= 70200)) {
-    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0" and "< 8.0.0". You are running ' . PHP_VERSION  .  '.';
+    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0". You are running ' . PHP_VERSION  .  '.';
 }
 
 if ($issues) {

tests/Composer/Test/Autoload/Fixtures/platform/no_php_lower_bound.php

@@ -1,14 +0,0 @@
-<?php
-
-// platform_check.php @generated by Composer
-
-$issues = array();
-
-if (!(PHP_VERSION_ID < 80000)) {
-    $issues[] = 'Your Composer dependencies require a PHP version "< 8.0.0". You are running ' . PHP_VERSION  .  '.';
-}
-
-if ($issues) {
-    echo 'Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues);
-    exit(104);
-}

tests/Composer/Test/Autoload/Fixtures/platform/specific_php_release.php

@@ -4,8 +4,8 @@
 
 $issues = array();
 
-if (!(PHP_VERSION_ID >= 70208 && PHP_VERSION_ID < 80000)) {
+if (!(PHP_VERSION_ID >= 70208)) {
-    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.8" and "< 8.0.0". You are running ' . PHP_VERSION  .  '.';
+    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.8". You are running ' . PHP_VERSION  .  '.';
 }
 
 if ($issues) {

tests/Composer/Test/Autoload/Fixtures/platform/typical.php

@@ -4,8 +4,8 @@
 
 $issues = array();
 
-if (!(PHP_VERSION_ID >= 70200 && PHP_VERSION_ID < 80000)) {
+if (!(PHP_VERSION_ID >= 70200)) {
-    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0" and "< 8.0.0". You are running ' . PHP_VERSION  .  '.';
+    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0". You are running ' . PHP_VERSION  .  '.';
 }
 
 $missingExtensions = array();