What is array filter in php?


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Explain me what are the 3 scope levels available in php and how would you define them?

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Explain the casts allowed in PHP?

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Tell me how is it possible to know the number of rows returned in result set?

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What is urlencode and urldecode in php?

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What are the advantages of indexes?

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What is the difference between mysql_fetch_array() and mysql_fetch_assoc()?

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Explain about the data types in PHP?

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