doq70020
2015-05-03 16:27
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需要检查才能在php中输入浮点数?

I want to validate and that the user only enters float number in the text field such as 3.4. I need to check only the $value1 and $value2 in this case using php.

libraryForm.php

<form action="savelibscores.php" method="POST">
S3: <input class="inputfield" type="text" name="s3" size="5"> <br /><br/>
S4: <input class="inputfield" type="text" name="s4" size="5"> <br /><br/>
<b>Year:<b/>
<select name="year"> 
<option value="Choose">Please select..</option>
<option value="2005">2005</option> 
<option value="2006">2006</option>
<option value="2007">2007</option>
<option value="2008">2008</option>
<option value="2010">2010</option>
<option value="2011">2011</option>
<option value="2012">2012</option></select><br/><br/>

<br/>
<input type="submit" value="Save" name="submit">
<input type="reset" name="reset" value="Clear"><br /><br/>

</form>

savelibscores.php

<?php

 define('DB_NAME','');
 define('DB_USER','');
 define('DB_PASSWORD','');
 define('DB_HOST','localhost');

 $connect = mysql_connect(DB_HOST,DB_USER,DB_PASSWORD);

 if(!$connect){
      die('Could not connect:'.mysql_error());
 }

 $db_selected=mysql_select_db(DB_NAME,$connect);

 if(!$db_selected){
    die('Can\'t use'.DB_NAME.':'.mysql_error());
 }

 if(isset($_POST['submit'])){
    $value1=$_POST['s3'];
    $value2=$_POST['s4'];
   $value3=$_POST['year'];
 if(!empty($value1) && !empty($value2) && !empty($value3)){
       $sql=mysql_query("INSERT INTO `library`(s3,s4,year) VALUES ('".$value1."','".$value2."','".$value3."')")or die(mysql_error());
}
   else{
    echo "Please fill all the fields.";
   }
}
?>

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我想验证并且用户只在文本字段中输入浮点数,例如 3.4 。 在这种情况下,我需要使用 php 检查 $ value1 $ value2

libraryForm .php

 &lt; form action =“savelibscores.php”method =“POST”&gt; 
S3:&lt; input  class =“inputfield”type =“text”name =“s3”size =“5”&gt;  &lt; br /&gt;&lt; br /&gt; 
S4:&lt; input class =“inputfield”type =“text”name =“s4”size =“5”&gt;  &lt; br /&gt;&lt; br /&gt; 
&lt; b&gt;年:&lt; b /&gt; 
&lt; select name =“year”&gt;  
&lt; option value =“选择”&gt;请选择..&lt; / option&gt; 
&lt; option value =“2005”&gt; 2005&lt; / option&gt;  
&lt; option value =“2006”&gt; 2006&lt; / option&gt; 
&lt; option value =“2007”&gt; 2007&lt; / option&gt; 
&lt; option value =“2008”&gt; 2008&lt; / option&gt; 
&lt;  ; option value =“2010”&gt; 2010&lt; / option&gt; 
&lt; option value =“2011”&gt; 2011&lt; / option&gt; 
&lt; option value =“2012”&gt; 2012&lt; / option&gt;&lt; / select&gt  ;&lt; br /&gt;&lt; br /&gt; 
 
&lt; br /&gt; 
&lt; input type =“submit”value =“保存”name =“submit”&gt; 
&lt; input type =“ 重置“name =”reset“value =”清除“&gt;&lt; br /&gt;&lt; br /&gt; 
 
&lt; / form&gt; 
   
 
 

savelibscores.php

 &lt;?php 
 
define('DB_NAME',''); 
 define('DB_USER',''); 
  define('DB_PASSWORD',''); 
 define('DB_HOST','localhost'); 
 
 $ connect = mysql_connect(DB_HOST,DB_USER,DB_PASSWORD); 
 
 if(!$ connect){  
 die('无法连接:'。mysql_error()); 
} 
 
 $ db_selected = mysql_select_db(DB_NAME,$ connect); 
 
 if if(!$ db_selected){
 die(' 不能使用'.DB_NAME。':'。mysql_error()); 
} 
 
 if(isset($ _ POST ['submit'])){
 $ value1 = $ _ POST ['s3'  ]; 
 $ value2  = $ _ POST ['s4']; 
 $ value3 = $ _ POST ['year']; 
 if(!empty($ value1)&amp;&amp;  !empty($ value2)&amp;&amp;  !empty($ value3)){
 $ sql = mysql_query(“INSERT INTO` library`(s3,s4,year)VALUES('”。$ value1。“','”。$ value2。“','”  。$ value3。“')”)或死(mysql_error()); 
} 
其他{
 echo“请填写所有字段。”; 
} 
} 
?&gt; 
 <  / code>  
 
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