Chapter 14. References Explained

Table of Contents
What References Are
What References Do
What References Are Not
Passing by Reference
Returning References
Unsetting References
Spotting References

What References Are

References in PHP are a means to access the same variable content by different names. They are not like C pointers, they are symbol table aliases. Note that in PHP, variable name and variable content are different, so the same content can have different names. The most close analogy is with Unix filenames and files - variable names are directory entries, while variable contents is the file itself. References can be thought of as hardlinking in Unix filesystem.


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