Test php 7.0, 7.1, 7.2 (arnaud-lb#431)

Author: arnaud-lb

.github/workflows/test.yml

@@ -39,6 +39,12 @@ jobs:
                 librdkafka: 'v0.11.6'
               - php: '7.3.0'
                 librdkafka: 'v0.11.6'
+              - php: '7.2.0'
+                librdkafka: 'v0.11.6'
+              - php: '7.1.0'
+                librdkafka: 'v0.11.6'
+              - php: '7.0.0'
+                librdkafka: 'v0.11.6'
               - php: '8.0.0'
                 librdkafka: 'master'
                 experimental: true

php_rdkafka_priv.h

@@ -55,8 +55,20 @@
 
 #define rdkafka_get_debug_object(type, object) get_object(object)
 
+#if PHP_MINOR_VERSION < 3
+/* Allocates object type and zeros it, but not the properties.
+ * Properties MUST be initialized using object_properties_init(). */
+static zend_always_inline void *zend_object_alloc(size_t obj_size, zend_class_entry *ce) {
+    void *obj = emalloc(obj_size + zend_object_properties_size(ce));
+    /* Subtraction of sizeof(zval) is necessary, because zend_object_properties_size() may be
+     * -sizeof(zval), if the object has no properties. */
+    memset(obj, 0, obj_size - sizeof(zval));
+    return obj;
+}
 #endif
 
+#endif // PHP 7
+
 #define Z_RDKAFKA_P(php_kafka_type, zobject) php_kafka_from_obj(php_kafka_type, Z_OBJ_P(zobject))
 
 #define php_kafka_from_obj(php_kafka_type, object) \