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PHP beginners tutorial 39 - returning data from a function
Rule #23 - Methods should never return null
Learn about php isset vs empty vs is null
The PHP null coalescing operator: getting values of variables that might not be set
Array : PHP function returning NULL instead of array
Return type declarations
The problem with null
Understanding Why json_decode() Returns NULL After Curl Exec in PHP
null - understanding Null data types in php.
Avoid Returning Null From Methods – There Is a Better Way To Write Them!
Always Use Type Declarations For Function Parameters and Return Values in PHP
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Last Updated: August 24, 2026
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