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对php校验表单,检测字段是否为空感兴趣的小伙伴,下面一起跟随脚本之家 jb51.cc的小编两巴掌来看看吧! 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。
<html>
<body>
<form METHOD="POST" ACTION="ErrorCheck.php">
<h1>Contact Information</h1>
<label>Nickname:</label>
<input TYPE="TEXT" NAME="nickname">
<label>Title:</label>
<input TYPE="TEXT" NAME="title">
<br />
<input TYPE="SUBMIT" VALUE="Submit">
<br />
<input TYPE="RESET" VALUE="Clear the Form">
</form>
</body>
</html>
php后端代码,保存为: ErrorCheck.php
/**
* php校验表单,检测字段是否为空
*
* @param
* @arrange 512-笔记网: jb51.cc
**/
<html>
<body>
<?php
$errorcount=0;
if (!trim($_POST['nickname'])) {
echo "<br /><b>Nickname</b> is required.";
$errorcount++;
}
if (!trim($_POST['title'])) {
echo "<br /><b>Title</b> is required.";
$errorcount++;
}
if ($errors > 0)
echo "<br /><br />Please use your browser's back button " .
"to return to the form,and correct error(s)";
?>
</body>
</html>
/*** 来自脚本之家 jb51.cc(jb51.cc) ***/ trim()函数可以去除字符串中的前后空字符
/**
* php校验表单,检测字段是否为空
*
* @param
* @arrange 512-笔记网: jb51.cc
**/
” ” (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.
“
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