SmartyCompilerException: Syntax error in template "file:/var/www/smarty/templates/hello.tpl" on line 10 "<h1>Hello, {$user ?? 'Guest'}</h1>" - Unexpected " ?", expected one of: "}" in file /var/www/smarty/templates/hello.tpl on line 10 #0 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templateparser.php(2819): Smarty_Internal_TemplateCompilerBase->trigger_template_error() #1 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templateparser.php(2880): Smarty_Internal_Templateparser->yy_syntax_error(40, ' ?') #2 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_smartytemplatecompiler.php(128): Smarty_Internal_Templateparser->doParse(40, ' ?') #3 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatecompilerbase.php(466): Smarty_Internal_SmartyTemplateCompiler->doCompile('<!DOCTYPE html>...', true) #4 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatecompilerbase.php(395): Smarty_Internal_TemplateCompilerBase->compileTemplateSource(Object(Smarty_Internal_Template), false, NULL) #5 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(184): Smarty_Internal_TemplateCompilerBase->compileTemplate(Object(Smarty_Internal_Template)) #6 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(141): Smarty_Template_Compiled->compileTemplateSource(Object(Smarty_Internal_Template)) #7 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(105): Smarty_Template_Compiled->process(Object(Smarty_Internal_Template)) #8 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(216): Smarty_Template_Compiled->render(Object(Smarty_Internal_Template)) #9 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(238): Smarty_Internal_Template->render(false, 0) #10 /var/www/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(116): Smarty_Internal_TemplateBase->_execute(Object(Smarty_Internal_Template), NULL, NULL, NULL, 0) #11 /var/www/public/index.php(26): Smarty_Internal_TemplateBase->fetch('hello.tpl') #12 {main}