CodeIgniter – Thecodesworld
Notice: Only variables should be passed by reference line 53, and line 65 - Stack Overflow
PHP: Only variables should be passed by reference – James' Desk
Novedades de PHP 7.*
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How do I pass a variable by reference? - Stack Overflow
PHP - Wikipedia
CodeIgniter 2.x y PHP 5.6.0 – Rafalinux
Issue While Setting in on Local Host XAMPP · Issue #6 · N3TC4T/Hotel-Management-System · GitHub
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Pass by reference vs value in Python - GeeksforGeeks
Reference Variable in Java - GeeksforGeeks
Codeigniter2.0.3 on PHP7: only variable references should be returned by reference(Common,Loader) - YouTube
PHP prompt only variables should be assigned by reference? | Develop Paper
مورد التصوير انسان محترم only variabels reference should be returned by reference php - themodelmutt.com
Reference Variable in Java - GeeksforGeeks
OOP in PHP! The 4 Pillars.. Hello there, this week I will be taking… | by Jared Matta | Medium
Solve Error(Message: Only variable references should be returned by reference) in Codeighter
Error en la web de twittaré – Programación en Internet
Only Variable References Should Be Returned By Reference - Design Corral
The List of the 10 Most Common Mistakes That PHP Developers Make | Toptal
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Khắc phục lỗi "Only variable references should be returned by reference" trong CI - Nosomovo
OpenAM: OpenIDのOPとRP構築
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