query: How do I resolve the error "PHP Notice: Use of undefined constant"?
positive_passages.docid: 27679
positive_passages.text: What does the PHP error message "Notice: Use of undefined constant" mean?
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negative_passages.text: Reference - What does this error mean in PHP?
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negative_passages.text: What is causing undefined control sequence?
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negative_passages.text: Suppress error with @ operator in PHP
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negative_passages.text: When do I use the PHP constant "PHP_EOL"?
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negative_passages.text: Assigning const value to const error in php
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