隐式转换为字符串而不是获取“对象ID＃..”

Question

I've moved to a new webhost were we have php 5.1 instead of 5.2 that I've been using until now. I still haven't figured out if it's a php version or configuration issue.

Right now most (or all) of the classes that have __toString functions convert to "Object ID #" (like in php4) but before they all returned the correct values.

How can I fix this?

Answer 1

Apparently prior to PHP 5.2 the __toString method was only "magically" called in certain circumstances (e.g. echo() and print()). So if you are currently using __toString() in a "magical" way outside of direct output functions it will not work as expected.

Source:

It is worth noting that before PHP 5.2.0 the __toString method was only called when it was directly combined with echo() or print(). Since PHP 5.2.0, it is called in any string context (e.g. in printf() with %s modifier) but not in other types contexts (e.g. with %d modifier). Since PHP 5.2.0, converting objects without __toString method to string would cause E_RECOVERABLE_ERROR.