query: What is the absolute safest way to find out if a URL exists or not?
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positive_passages.text: Test if a website is alive from a C# application
negative_passages.docid: 105005
negative_passages.text: No error message if the URL is very long
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negative_passages.text: Is there a way in Java to determine if a path is valid without attempting to create a file?
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negative_passages.text: What's quicker and better to determine if an array key exists in PHP?
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negative_passages.text: Should URL be case sensitive?
negative_passages.docid: 61409
negative_passages.text: How can I check if a URL exists via PHP?
negative_passages.docid: 135517
negative_passages.text: How do I check if a file exists in Java?
negative_passages.docid: 4521
negative_passages.text: Is there an "exists" function for jQuery?
negative_passages.docid: 59599
negative_passages.text: What is a good regular expression to match a URL?
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negative_passages.text: Powershell and checking for Site existence
negative_passages.docid: 130096
negative_passages.text: How to test if a URL string is absolute or relative?
negative_passages.docid: 73239
negative_passages.text: Safe Alternative to gets
negative_passages.docid: 28774
negative_passages.text: How to Check Path is existing or not in java?
negative_passages.docid: 17824
negative_passages.text: How to detect the presence of URL in a string
negative_passages.docid: 19277
negative_passages.text: Print url only if doi not present
negative_passages.docid: 147958
negative_passages.text: What is a RELIABLE way to detect a client's browser and its version number?