Undefined variable error, but variable is defined
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PHP conditionals, brackets needed?
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declaring protected variable in javascript
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What is causing undefined control sequence?
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Avoid running the script if a variable is not defined
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Undefined Reference to a function
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How to declare a global variable in php?
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Are undefined terms allowed in a sequence?
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Use of 'extern' keyword while defining the variable
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I just assigned a variable, but echo $variable shows something else
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How to disable pylint 'Undefined variable' error for a specific variable in a file?
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Expressions containing globally undefined symbols inside a function where they are defined
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undefined offset PHP error
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What is an undefined reference/unresolved external symbol error and how do I fix it?
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Variable scoping in Module
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How to initialize var?
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\newcommand is undefined control sentence
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Java variable might not have been initialized?