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新手-PHP-测试“空”字符串 - php
This question already has answers here: Closed 7 years ago. Possible Duplicate: Double equals and tripple equals in php 我正在尝试针对各种不为空的“空”变量进行测试。经常出现的一种情况是 如果字符串等于“”（即两个单引号字符），则执行 xy […]
This question already has answers here: Closed 7 years ago. Possible Duplicate: Double equals and tripple equals in php 我正在尝试针对各种不为空的“空”变量进行测试。经常出现的一种情况是 如果字符串等于“”（即两个单引号字符），则执行 xy […]