嗨,我想验证用户输入的表单使用PHP。 我已经设法验证文本,数字和年份输入,但无法获得工作价格。验证'价格'(双)表单输入PHP
我在我的代码的顶部创建误差变量:
$titleErr = ""; $developerErr = ""; $releaseErr = ""; $stockErr = ""; $priceErr = "";
我然后验证输入并分配消息发送到所述可变如果需要的话:
if (!preg_match("/^[a-zA-Z ]*$/",$title)) {
$titleErr = "Invalid input, only letters and white space allowed.";
} else if (!preg_match("/^[a-zA-Z ]*$/",$developer)){
$developerErr = "Invalid input, only letters and white space allowed.";
} else if ($release<1990 || $release>2020){
$releaseErr = "Invalid input, enter a year between 1990 & 2020.";
} else if (!is_numeric($stock)){
$stockErr = "Invalid input, only numbers allowed.";
} else if (!is_float($price)){
$priceErr = "Invalid input, only doubles allowed.";
}
前4个语句验证完美输入。然而,最后一个检查输入是否为浮点数(价格例如10.99)似乎会在输入正确的输入时返回错误消息。
这是我的形式:
<form class ="form-horizontal" role="form" id="add" name="add" action="?" method="post">
<div class="form-group">
<label class="control-label col-sm-2">Title</label> <div class="col-sm-10"><input class="form-control" id="addFormTitle" name="title" type="text"> <span class="error"><?php echo $titleErr;?></span></div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Developer</label> <div class="col-sm-10"><input class="form-control" id="addFormDeveloper" name="developer" type="text"> <span class="error"><?php echo $developerErr;?></span></div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Release (Year Format/YYYY)</label> <div class="col-sm-10"><input class="form-control" id="addFormRelease" name="release" type="text"> <span class="error"><?php echo $releaseErr;?></span></div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Stock</label> <div class="col-sm-10"><input class="form-control" id="addFormStock" name="stock" type="text"> <span class="error"><?php echo $stockErr;?></span></div>
</div>
<div class="form-group">
<label class="control-label col-sm-2">Price (£)</label> <div class="col-sm-10"><input class="form-control" id="addFormPrice" name="price" type="text"> <span class="error"><?php echo $priceErr;?></span></div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-default" name="addSubmit" value="Add product">Submit</button>
</div>
</div>
</form>
当您的浏览器向PHP发送值(例如,使用GET或POST),**所有**都被PHP解释为一个字符串。即使该值为'1',这实际上是“1”。因此使用'is_float()'将永远是错误的。 – Mike
检查出[验证价格]的正则表达式(http://stackoverflow.com/a/4983648/5509627) – Tristan