/**
* surround a string with braces, if it would need braces in order to be used
* as a PHP property name in eval()
*
* @param string $propertyName
* the property name to add braces to (if required)
* @return string
*/
function quote_property($propertyName)
{
// robustness!
if (!is_stringy($propertyName)) {
throw new InvalidArgumentException('$propertyName is not a valid class or object property name');
}
// would the string need braces if we used it in eval()?
//
// the rules are:
// - first character must be an ASCII letter or an underscore
// - the remaining characters can only be ASCII letters, numbers,
// or an underscore
//
// any string that doesn't satisfy those rules needs braces adding
if (!preg_match("/[A-Za-z_][A-Za-z0-9_]{" . (strlen($propertyName) - 1) . "}/", $propertyName)) {
// yes it would
return '{' . $propertyName . '}';
}
// if we get here, then no action is needed
return $propertyName;
}
/**
* @covers ::is_stringy
*/
public function test_returns_FALSE_for_resources()
{
// ----------------------------------------------------------------
// setup your test
$item = STDIN;
$expectedResult = false;
// ----------------------------------------------------------------
// perform the change
$actualResult = is_stringy($item);
// ----------------------------------------------------------------
// test the results
$this->assertEquals($expectedResult, $actualResult);
}