fix: use bookworm-based php image to fix glibc 2.38 incompatibility (#8381)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -268,7 +268,7 @@ RUN bun install -g windmill-cli \
 RUN curl -fsSL https://claude.ai/install.sh | bash \
     && cp /root/.local/share/claude/versions/* /usr/bin/claude
 
-COPY --from=php:8.3.30-cli /usr/local/bin/php /usr/bin/php
+COPY --from=php:8.3.30-cli-bookworm /usr/local/bin/php /usr/bin/php
 COPY --from=composer:2.9.5 /usr/bin/composer /usr/bin/composer
 
 # add the docker client to call docker from a worker if enabled

integration_tests/test/identity_script_test.py

@@ -29,6 +29,12 @@ func main(x int) (interface{}, error) {
     "python3": """
 def main(x: int):
     return x
+""",
+    "php": """<?php
+
+function main(int $x): int {
+    return $x;
+}
 """,
 }
 
@@ -80,3 +86,8 @@ class TestIdentityScript(unittest.TestCase):
         path = PATH_TEMPLATE.format(lang="python3")
         result = self._client.run_sync(path, {"x": 5})
         self.assertEqual(result, 5)
+
+    def test_php(self):
+        path = PATH_TEMPLATE.format(lang="php")
+        result = self._client.run_sync(path, {"x": 5})
+        self.assertEqual(result, 5)