studyuncaught referenceerror assignment to undeclared variable itemShare on FacebookShare on Twitter134IMAGESJavaScript ReferenceErrorjavascriptJavaScript: Uncaught ReferenceError:Uncaught reference error: [variable] is not definedPHPFatalError: Uncaught mysqli_sql_exception: Undeclared variableUncaught TypeError: Assignment to constant variable
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