PHP: Interview Questions PART-10
Is it possible to submit a form with a dedicated button?
It is possible to use the document.form.submit() function to submit the form. For example: <input type=button value="SUBMIT" onClick="document.form.submit()">
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What is the difference between ereg_replace() and eregi_replace()?
The function eregi_replace() is identical to the function ereg_replace() except that it ignores case distinction when matching alphabetic characters.
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Is it possible to protect special characters in a query string?
Yes, we use the urlencode() function to be able to protect special characters.
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What are the three classes of errors that can occur in PHP?
The three basic classes of errors are notices (non-critical), warnings (serious errors) and fatal errors (critical errors).
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What is the difference between characters \034 and \x34?
\034 is octal 34 and \x34 is hex 34.
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How can we pass the variable through the navigation between the pages?
It is possible to pass the variables between the PHP pages using sessions, cookies or hidden form fields.
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Is it possible to extend the execution time of a PHP script?
The use of the set_time_limit(int seconds) enables us to extend the execution time of a PHP script. The default limit is 30 seconds.
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Is it possible to destroy a cookie?
Yes, it is possible by setting the cookie with a past expiration time.
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What is the default session time in PHP?
The default session time in php is until the closing of the browser
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Is it possible to use COM component in PHP?
Yes, it's possible to integrate (Distributed) Component Object Model components ((D)COM) in PHP scripts which is provided as a framework.
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