WordPress · adamziel · Apr 16, 2026 · Apr 14, 2026 · Apr 14, 2026 · Apr 14, 2026
diff --git a/package-lock.json b/package-lock.json
diff --git a/packages/php-wasm/compile/build.js b/packages/php-wasm/compile/build.js
@@ -287,12 +287,17 @@ await cleanupOldMinorVersions();
 // Build the base image
 await asyncSpawn('make', ['base-image'], { cwd: sourceDir, stdio: 'inherit' });
 
+const phpVersionForDockerfile = getArg('PHP_VERSION').replace('PHP_VERSION=', '');
+const dockerfile = phpVersionForDockerfile.startsWith('5.2')
+	? 'php/Dockerfile-5-2'
+	: 'php/Dockerfile';
+
 await asyncSpawn(
 	'docker',
 	[
 		'build',
 		'-f',
-		'php/Dockerfile',
+		dockerfile,
 		'..',
 		'--tag=php-wasm',
 		'--progress=plain',

diff --git a/packages/php-wasm/compile/php-post-message-to-js/post_message_to_js.c b/packages/php-wasm/compile/php-post-message-to-js/post_message_to_js.c
@@ -3,6 +3,11 @@
 #include "ext/standard/info.h"
 #include <emscripten.h>
 
+/* PHP_FE_END was added in PHP 5.3.7; provide fallback for PHP 5.2 */
+#ifndef PHP_FE_END
+#define PHP_FE_END {NULL, NULL, NULL}
+#endif
+
 /**
  * Provided by php_wasm.c:
  */
@@ -14,16 +19,22 @@ PHP_FUNCTION(post_message_to_js)
     char *data;
     int data_len;
 
-    if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &data, &data_len) == FAILURE) {
+    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &data, &data_len) == FAILURE) {
         return;
     }
 
     char *response;
     size_t response_len = js_module_onMessage(data, &response);
-    if (response_len != -1) {
+    if (response_len != (size_t)-1) {
+#if PHP_MAJOR_VERSION >= 7
         zend_string *return_string = zend_string_init(response, response_len, 0);
         free(response);
         RETURN_NEW_STR(return_string);
+#else
+        RETVAL_STRINGL(response, response_len, 1);
+        free(response);
+        return;
+#endif
     } else {
         RETURN_NULL();
     }
@@ -39,6 +50,12 @@ PHP_MINFO_FUNCTION(post_message_to_js)
 }
 /* }}} */
 
+/* {{{ arginfo */
+ZEND_BEGIN_ARG_INFO_EX(arginfo_post_message_to_js, 0, 1, 1)
+ZEND_ARG_INFO(0, data)
+ZEND_END_ARG_INFO()
+/* }}} */
+
 /* {{{ post_message_to_js_functions[] */
 const zend_function_entry post_message_to_js_functions[] = {
     PHP_FE(post_message_to_js, arginfo_post_message_to_js)

diff --git a/packages/php-wasm/compile/php-post-message-to-js/post_message_to_js.h b/packages/php-wasm/compile/php-post-message-to-js/post_message_to_js.h
@@ -4,10 +4,6 @@
 extern zend_module_entry post_message_to_js_module_entry;
 #define phpext_post_message_to_js_ptr &post_message_to_js_module_entry
 
-ZEND_BEGIN_ARG_INFO_EX(arginfo_post_message_to_js, 0, 1, 1)
-ZEND_ARG_INFO(0, data)
-ZEND_END_ARG_INFO()
-
 PHP_FUNCTION(post_message_to_js);
 
 #define PHP_POST_MESSAGE_TO_JS_VERSION "1.0.0"

diff --git a/packages/php-wasm/compile/php-wasm-dns-polyfill/dns_polyfill.c b/packages/php-wasm/compile/php-wasm-dns-polyfill/dns_polyfill.c
@@ -5,6 +5,11 @@
 #include "dns_polyfill.h"
 #include "ext/standard/info.h"
 
+/* ZEND_FE_END was added in PHP 5.3.7; provide fallback for PHP 5.2 */
+#ifndef ZEND_FE_END
+#define ZEND_FE_END {NULL, NULL, NULL}
+#endif
+
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
@@ -119,21 +124,27 @@ PHP_FUNCTION(dns_check_record)
 	HEADER *hp;
 	querybuf answer = {0};
 	char *hostname;
+#if PHP_MAJOR_VERSION >= 7
 	size_t hostname_len;
 	size_t rectype_len = 0;
 	zend_string *rectype = NULL;
+#else
+	int hostname_len;
+	int rectype_len = 0;
+	char *rectype = NULL;
+#endif
 	int type = DNS_T_MX, i;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|s", &hostname, &hostname_len, &rectype, &rectype_len) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|s", &hostname, &hostname_len, &rectype, &rectype_len) == FAILURE) {
 		return;
 	}
 
 	if (hostname_len == 0) {
-		php_error_docref(NULL, E_WARNING, "Host cannot be empty");
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Host cannot be empty");
 		RETURN_FALSE;
 	}
 
-	php_error_docref(NULL, E_WARNING, "dns_check_record() always returns false in PHP.wasm.");
+	php_error_docref(NULL TSRMLS_CC, E_WARNING, "dns_check_record() always returns false in PHP.wasm.");
 
     RETURN_FALSE;
 }
@@ -143,8 +154,13 @@ PHP_FUNCTION(dns_check_record)
 PHP_FUNCTION(dns_get_record)
 {
 	char *hostname;
+#if PHP_MAJOR_VERSION >= 7
 	size_t hostname_len;
 	zend_long type_param = PHP_DNS_ANY;
+#else
+	int hostname_len;
+	long type_param = PHP_DNS_ANY;
+#endif
 	zval *authns = NULL, *addtl = NULL;
 	int type_to_fetch;
 	int dns_errno;
@@ -155,7 +171,7 @@ PHP_FUNCTION(dns_get_record)
 	int type, first_query = 1, store_results = 1;
 	zend_bool raw = 0;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|lz!z!b",
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|lz!z!b",
 			&hostname, &hostname_len, &type_param, &authns, &addtl, &raw) == FAILURE) {
 		return;
 	}
@@ -173,7 +189,7 @@ PHP_FUNCTION(dns_get_record)
 		}
 	}
 
-	php_error_docref(NULL, E_WARNING, "dns_get_record() always returns an empty array in PHP.wasm.");
+	php_error_docref(NULL TSRMLS_CC, E_WARNING, "dns_get_record() always returns an empty array in PHP.wasm.");
 
 	/* Initialize the return array */
 	array_init(return_value);
@@ -186,7 +202,11 @@ PHP_FUNCTION(dns_get_record)
 PHP_FUNCTION(dns_get_mx)
 {
 	char *hostname;
+#if PHP_MAJOR_VERSION >= 7
 	size_t hostname_len;
+#else
+	int hostname_len;
+#endif
 	zval *mx_list, *weight_list = NULL;
 	int count, qdc;
 	u_short type, weight;
@@ -196,12 +216,18 @@ PHP_FUNCTION(dns_get_mx)
 	uint8_t *cp, *end;
 	int i;
 
+#if PHP_MAJOR_VERSION >= 7
 	ZEND_PARSE_PARAMETERS_START(2, 3)
 		Z_PARAM_STRING(hostname, hostname_len)
 		Z_PARAM_ZVAL(mx_list)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_ZVAL(weight_list)
 	ZEND_PARSE_PARAMETERS_END();
+#else
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz|z", &hostname, &hostname_len, &mx_list, &weight_list) == FAILURE) {
+		return;
+	}
+#endif
 
 	array_init(mx_list);
 	if (!mx_list) {
@@ -215,7 +241,7 @@ PHP_FUNCTION(dns_get_mx)
 		}
 	}
 
-	php_error_docref(NULL, E_WARNING, "dns_get_mx() always returns an empty array in PHP.wasm.");
+	php_error_docref(NULL TSRMLS_CC, E_WARNING, "dns_get_mx() always returns an empty array in PHP.wasm.");
 
     RETURN_FALSE;
 }
@@ -256,6 +282,31 @@ PHP_MSHUTDOWN_FUNCTION(dns_polyfill)
 	return SUCCESS;
 }
 
+/* {{{ arginfo definitions */
+ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_check_record, 0, 0, 1)
+ZEND_ARG_INFO(0, host)
+ZEND_ARG_INFO(0, type)
+ZEND_END_ARG_INFO()
+
+#define arginfo_checkdnsrr arginfo_dns_check_record
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_get_record, 0, 0, 1)
+ZEND_ARG_INFO(0, hostname)
+ZEND_ARG_INFO(0, type)
+ZEND_ARG_ARRAY_INFO(1, authns, 1)
+ZEND_ARG_ARRAY_INFO(1, addtl, 1)
+ZEND_ARG_INFO(0, raw)
+ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_get_mx, 0, 0, 2)
+ZEND_ARG_INFO(0, hostname)
+ZEND_ARG_INFO(1, mxhosts)
+ZEND_ARG_INFO(1, weight)
+ZEND_END_ARG_INFO()
+
+#define arginfo_getmxrr arginfo_dns_get_mx
+/* }}} */
+
 /* {{{ dns_polyfill_functions[] */
 const zend_function_entry dns_polyfill_functions[] = {
 	ZEND_FE(dns_get_mx, arginfo_dns_get_mx)

diff --git a/packages/php-wasm/compile/php-wasm-dns-polyfill/dns_polyfill.h b/packages/php-wasm/compile/php-wasm-dns-polyfill/dns_polyfill.h
@@ -53,33 +53,8 @@
 extern zend_module_entry dns_polyfill_module_entry;
 #define phpext_dns_polyfill_ptr &dns_polyfill_module_entry
 
-ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_check_record, 0, 0, 1)
-ZEND_ARG_INFO(0, host)
-ZEND_ARG_INFO(0, type)
-ZEND_END_ARG_INFO()
-
-#define arginfo_checkdnsrr arginfo_dns_check_record
-
 PHP_FUNCTION(dns_check_record);
-
-ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_get_record, 0, 0, 1)
-ZEND_ARG_INFO(0, hostname)
-ZEND_ARG_INFO(0, type)
-ZEND_ARG_ARRAY_INFO(1, authns, 1)
-ZEND_ARG_ARRAY_INFO(1, addtl, 1)
-ZEND_ARG_INFO(0, raw)
-ZEND_END_ARG_INFO()
-
 PHP_FUNCTION(dns_get_record);
-
-ZEND_BEGIN_ARG_INFO_EX(arginfo_dns_get_mx, 0, 0, 2)
-ZEND_ARG_INFO(0, hostname)
-ZEND_ARG_INFO(1, mxhosts) /* ARRAY_INFO(1, mxhosts, 1) */
-ZEND_ARG_INFO(1, weight)  /* ARRAY_INFO(1, weight, 1) */
-ZEND_END_ARG_INFO()
-
-#define arginfo_getmxrr arginfo_dns_get_mx
-
 PHP_FUNCTION(dns_get_mx);
 
 #define PHP_DNS_POLYFILL_VERSION "1.0.0"

diff --git a/packages/php-wasm/compile/php-wasm-memory-storage/wasm_memory_storage.c b/packages/php-wasm/compile/php-wasm-memory-storage/wasm_memory_storage.c
@@ -22,6 +22,8 @@
 #include "Zend/zend_alloc.h"
 #include "php_wasm_memory_storage.h"
 
+#if PHP_MAJOR_VERSION >= 7
+
 /**
  * Allocate a chunk of memory.
  *
@@ -112,6 +114,22 @@ PHP_MSHUTDOWN_FUNCTION(wasm_memory_storage)
 	return SUCCESS;
 }
 
+#else /* PHP < 7 */
+
+/* Custom memory storage is not available in PHP 5.x.
+ * Provide no-op MINIT/MSHUTDOWN. */
+PHP_MINIT_FUNCTION(wasm_memory_storage)
+{
+	return SUCCESS;
+}
+
+PHP_MSHUTDOWN_FUNCTION(wasm_memory_storage)
+{
+	return SUCCESS;
+}
+
+#endif /* PHP_MAJOR_VERSION >= 7 */
+
 /* {{{ PHP_MINFO_FUNCTION */
 PHP_MINFO_FUNCTION(wasm_memory_storage)
 {