Fix php-proxying of binaries to avoid proxying phar files, fixes #9742

src/Composer/Installer/BinaryInstaller.php

@@ -192,7 +192,11 @@ class BinaryInstaller
         $binFile = basename($binPath);
 
         $binContents = file_get_contents($bin);
+        // For php files, we generate a PHP proxy instead of a shell one,
+        // which allows calling the proxy with a custom php process
         if (preg_match('{^(?:#!(?:/usr)?/bin/env php|#!(?:/usr)?/bin/php|<?php)\r?\n}', $binContents, $match)) {
+            // verify the file is not a phar file, because those do not support php-proxying
+            if (false === ($pos = strpos($binContents, '__HALT_COMPILER')) || false === strpos(substr($binContents, 0, $pos), 'Phar::mapPhar')) {
                 $proxyCode = trim($match[0]);
                 // carry over the existing shebang if present, otherwise add our own
                 if ($proxyCode === "<?php") {
@@ -226,6 +230,7 @@ include \$binPath;
 
 PROXY;
             }
+        }
 
         $proxyCode = <<<PROXY
 #!/usr/bin/env sh