What is the significance of the error "Use of undefined constant name" in PHP?

The error "Use of undefined constant name" in PHP occurs when a constant is used without being defined first. To solve this issue, you need to either define the constant using the define() function or use a string instead of a constant. 

// Incorrect usage of undefined constant
echo name;

// Corrected code by using a string instead
echo 'name';

Keywords

PHP Error Undefined constant Constants Programming.

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