diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index ee83ee75ff6ea..585a798c55fb8 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -9686,6 +9686,20 @@ static void zend_compile_class_decl(znode *result, const zend_ast *ast, bool top
 		}
 	}
 
+	/* When compiling without execution (opcache_compile_file), link simple
+	 * classes so opcache can early-bind them from cache. Skip preloading. */
+	if (!ce->num_interfaces && !ce->num_traits && !ce->num_hooked_prop_variance_checks
+#ifdef ZEND_OPCACHE_SHM_REATTACHMENT
+	 && !ce->num_hooked_props
+#endif
+	 && !extends_ast
+	 && (CG(compiler_options) & ZEND_COMPILE_WITHOUT_EXECUTION)
+	 && !(CG(compiler_options) & ZEND_COMPILE_PRELOAD)) {
+		zend_build_properties_info_table(ce);
+		zend_inheritance_check_override(ce);
+		ce->ce_flags |= ZEND_ACC_LINKED;
+	}
+
 	opline = get_next_op();
 
 	if (ce->parent_name) {
diff --git a/ext/opcache/tests/gh18714.phpt b/ext/opcache/tests/gh18714.phpt
new file mode 100644
index 0000000000000..b79afa8c09986
--- /dev/null
+++ b/ext/opcache/tests/gh18714.phpt
@@ -0,0 +1,28 @@
+--TEST--
+GH-18714 (opcache_compile_file() breaks class hoisting)
+--EXTENSIONS--
+opcache
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+--FILE--
+<?php
+
+// Class used before declaration relies on hoisting
+file_put_contents(__DIR__ . '/gh18714_test.php', <<<'PHP'
+<?php
+$x = new HelloWorld();
+echo get_class($x) . "\n";
+class HelloWorld {}
+PHP);
+
+opcache_compile_file(__DIR__ . '/gh18714_test.php');
+require_once __DIR__ . '/gh18714_test.php';
+
+?>
+--CLEAN--
+<?php
+@unlink(__DIR__ . '/gh18714_test.php');
+?>
+--EXPECT--
+HelloWorld
diff --git a/ext/opcache/zend_accelerator_module.c b/ext/opcache/zend_accelerator_module.c
index 1eaa183f9df5b..02e07b39f3510 100644
--- a/ext/opcache/zend_accelerator_module.c
+++ b/ext/opcache/zend_accelerator_module.c
@@ -984,6 +984,11 @@ ZEND_FUNCTION(opcache_compile_file)
 	orig_compiler_options = CG(compiler_options);
 	CG(compiler_options) |= ZEND_COMPILE_WITHOUT_EXECUTION;
 
+	/* Save class/function table state so we can undo the side effects
+	 * of zend_accel_load_script() called by persistent_compile_file(). */
+	uint32_t orig_class_count = EG(class_table)->nNumUsed;
+	uint32_t orig_function_count = EG(function_table)->nNumUsed;
+
 	if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) {
 		/* During preloading, a failure in opcache_compile_file() should result in an overall
 		 * preloading failure. Otherwise we may include partially compiled files in the preload
@@ -1001,6 +1006,14 @@ ZEND_FUNCTION(opcache_compile_file)
 	CG(compiler_options) = orig_compiler_options;
 
 	if(op_array != NULL) {
+		/* Undo classes/functions registered by zend_accel_load_script().
+		 * opcache_compile_file() should only cache without side effects.
+		 * Skip during preloading: preload needs the registrations to persist. */
+		if (!(orig_compiler_options & ZEND_COMPILE_PRELOAD)) {
+			zend_hash_discard(EG(class_table), orig_class_count);
+			zend_hash_discard(EG(function_table), orig_function_count);
+		}
+
 		destroy_op_array(op_array);
 		efree(op_array);
 		RETVAL_TRUE;