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Comparison of several functions in PHP to determine whether it is empty_PHP tutorial
- WBOYOriginal
- 2016-07-13 09:56:32850browse
Comparison of several functions in PHP to determine whether it is empty
This article mainly introduces the comparison of several functions in PHP to determine whether it is empty. This article explains gettype(), empty (), is_null(), isset() and other functions return values under different variables. Friends in need can refer to it
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