本文实例讲述了php校验表单检测字段是否为空的方法。分享给大家供大家参考。具体如下：
php校验表单，检测字段是否为空，，当表单中有未填写的字段，则会显示错误信息。
contact informationnickname:title:
php后端代码，保存为： errorcheck.php
nickname is required.;$errorcount++; } if (!trim($_post['title'])) {echo
title is required.;$errorcount++; } if ($errors > 0)echo
please use your browser's back button .to return to the form, and correct error(s); ?>trim()函数可以去除字符串中的前后空字符
(ascii 32 (0×20)), an ordinary space.\t (ascii 9 (0×09)), a tab.\n (ascii 10 (0x0a)), a new line (line feed).\r (ascii 13 (0x0d)), a carriage return.\0″ (ascii 0 (0×00)), the nul-byte.\x0b (ascii 11 (0x0b)), a vertical tab.
希望本文所述对大家的php程序设计有所帮助。