我可以';t呼应某些变量


I can't echo certain variables?

我正在尝试使用php验证我的表单。问题是我有两个单选按钮和三个选择。当我在下面回显我的代码时,什么都没有发生,不会显示任何错误,但变量不会回显。如果我更改代码并排除"$sex,$month,$day&$year",它会出现回声。我想知道我是否应该使用jquery来验证选择字段和单选字段?或者php中有更好的结构可以做到这一点?

我的html是这样的:

<form id="fleft" action="signup.php" method="POST">
    <input type="text" id="box1" name="username" maxlength="30"/><br><br>
    <input type="text" id="box2" name="FirstName" maxlength="30"/>&nbsp;&nbsp;
    <input type="text" id="box3" name="LastName" maxlength="30"/><br><br>
    <input type="text" id="box4" name="Emailadd"  maxlength="50"/>&nbsp;&nbsp;
    <input type="text" id="box5" name="reEmailadd" maxlength="50"/><br><br>
    <input type="password" id="box6" name="Password" maxlength="30"/>&nbsp;&nbsp;
    <input type="password" id="box7" name="rePassword"  maxlength="30"/><br><br>
    <input type="radio" name="sex" value="Male"><label id="male" for="Male">&nbsp; Male &nbsp; &nbsp;</label>
    <input type="radio" name="sex" value="Female"><label id="female" for="female">&nbsp;Female<br><br>
    <label id="d_o_b" for="Date Of Birth">Date Of Birth:</label><br>
        <select name="Month">
            <option value="Month">Month</option>
            <option value="January">January</option>
            <option value="February">February</option>
            <option value="March">March</option>
            <option value="April">April</option>
            <option value="May">May</option>
            <option value="June">June</option>
            <option value="July">July</option>
            <option value="August">August</option>
            <option value="September">September</option>
            <option value="October">October</option>
            <option value="November">November</option>
            <option value="December">December</option>
        </select>
        <select name="Day">
            <option value="Day">Day</option>
            <option value="01">01</option>
            <option value="02">02</option>
            <option value="03">03</option>
            <option value="04">04</option>
            <option value="05">05</option>
            <option value="06">06</option>
            <option value="07">07</option>
            <option value="08">08</option>
            <option value="09">09</option>
            <option value="10">10</option>
            <option value="11">11</option>
            <option value="12">12</option>
            <option value="13">13</option>
            <option value="14">14</option>
            <option value="15">15</option>
            <option value="16">16</option>
            <option value="17">17</option>
            <option value="18">18</option>
            <option value="19">19</option>
            <option value="20">20</option>
            <option value="21">21</option>
            <option value="22">22</option>
            <option value="23">23</option>
            <option value="24">24</option>
            <option value="25">25</option>
            <option value="26">26</option>
            <option value="27">27</option>
            <option value="28">28</option>
            <option value="29">29</option>
            <option value="30">30</option>
            <option value="31">31</option>
        </select>
        <select name="Year">
            <option value="Year">Year</option>
            <option value="2012">2012</option>
            <option value="2011">2011</option>
            <option value="2010">2010</option>
            <option value="2009">2009</option>
            <option value="2008">2008</option>
            <option value="2007">2007</option>
            <option value="2006">2006</option>
            <option value="2005">2005</option>
            <option value="2004">2004</option>
            <option value="2003">2003</option>
            <option value="2002">2002</option>
            <option value="2001">2001</option>
            <option value="2000">2000</option>
            <option value="1999">1999</option>
            <option value="1998">1998</option>
            <option value="1997">1997</option>
            <option value="1996">1996</option>
            <option value="1995">1995</option>
            <option value="1994">1994</option>
            <option value="1993">1993</option>
            <option value="1992">1992</option>
            <option value="1991">1991</option>
            <option value="1990">1990</option>
            <option value="1989">1989</option>
            <option value="1988">1988</option>
            <option value="1987">1987</option>
            <option value="1986">1986</option>
            <option value="1985">1985</option>
            <option value="1984">1984</option>
            <option value="1983">1983</option>
            <option value="1982">1982</option>
            <option value="1981">1981</option>
            <option value="1980">1980</option>
            <option value="1979">1979</option>
            <option value="1978">1978</option>
            <option value="1977">1977</option>
            <option value="1976">1976</option>
            <option value="1975">1975</option>
            <option value="1974">1974</option>
            <option value="1973">1973</option>
            <option value="1972">1972</option>
            <option value="1971">1971</option>
            <option value="1970">1970</option>
            <option value="1969">1969</option>
            <option value="1968">1968</option>
            <option value="1967">1967</option>
            <option value="1966">1966</option>
            <option value="1965">1965</option>
            <option value="1964">1964</option>
            <option value="1963">1963</option>
            <option value="1962">1962</option>
            <option value="1961">1961</option>
            <option value="1960">1960</option>
            <option value="1959">1959</option>
            <option value="1958">1958</option>
            <option value="1957">1957</option>
            <option value="1956">1956</option>
            <option value="1955">1955</option>
            <option value="1954">1954</option>
            <option value="1953">1953</option>
            <option value="1952">1952</option>
            <option value="1951">1951</option>
            <option value="1950">1950</option>
            <option value="1949">1949</option>
            <option value="1948">1948</option>
            <option value="1947">1947</option>

我的php是这样的:

if (isset($_POST['username']) && isset($_POST['First Name']) && isset($_POST['Last    Name']) && isset($_POST['Emailadd']) && isset($_POST['reEmailadd']) && isset($_POST['Password']) && isset($_POST['rePassword']) && isset($_POST['sex']) && isset($_POST['Month']) && isset($_POST['Day']) && isset($_POST['Year'])){
   $username = $_POST['username'];
   $firstname = $_POST['First Name'];
   $lastname = $_POST['Last Name'];
   $emailaddr = $_POST['Emailadd'];
   $reemailadd = $_POST['reEmailadd'];
   $pwd = $_POST['Password'];
   $repwd = $_POST['rePassword'];
   $sex = $_POST['sex'];
   $month = $_POST['Month'];
   $day = $_POST['Day'];
   $year = $_POST['Year'];
if(!empty($username) && !empty($firstname) && !empty($lastname) && !empty($emailaddr) && !empty($reemailadd) && !empty($pwd) && !empty($repwd) && !empty($sex) && !empty($month) && !empty($day) && !empty($year)){
         echo 'ok';
            }else {
                echo 'incorrect';

删除此处的额外空间

$firstname = $_POST['First Name'];
                          ^
$lastname = $_POST['Last Name'];
                        ^

$firstname = $_POST['FirstName'];
$lastname = $_POST['LastName'];


获取所有$_POST变量的数组

echo '<pre>',print_r($_POST,true),'</pre>';

ini_set("display_errors", "1");添加到PHP脚本的最顶部,以查看是否有任何未定义的变量通知。因为PHP不需要变量初始化,所以可以调用空/null的变量而不会出现致命错误。

首先,我犯的错误是在我的html:中

<select value="Year">
            <option value="Year">Year</option>
            <option value="2012">2012</option>
            <option value="2011">2011</option>
            <option value="2010">2010</option>
            <option value="2009">2009</option>
            <option value="2008">2008</option>
            <option value="2007">2007</option>
            <option value="2006">2006</option>
            <option value="2005">2005</option>
            <option value="2004">2004</option>
            <option value="2003">2003</option>
            <option value="2002">2002</option>
            <option value="2001">2001</option>
            <option value="2000">2000</option>
            <option value="1999">1999</option>
            <option value="1998">1998</option>
            <option value="1997">1997</option>
            <option value="1996">1996</option>
            <option value="1995">1995</option>
            <option value="1994">1994</option>
            <option value="1993">1993</option>
            <option value="1992">1992</option>
            <option value="1991">1991</option>
            <option value="1990">1990</option>
            <option value="1989">1989</option>
            <option value="1988">1988</option>
            <option value="1987">1987</option>
            <option value="1986">1986</option>
            <option value="1985">1985</option>
            <option value="1984">1984</option>
            <option value="1983">1983</option>
            <option value="1982">1982</option>
            <option value="1981">1981</option>
            <option value="1980">1980</option>
            <option value="1979">1979</option>
            <option value="1978">1978</option>
            <option value="1977">1977</option>
            <option value="1976">1976</option>
            <option value="1975">1975</option>
            <option value="1974">1974</option>
            <option value="1973">1973</option>
            <option value="1972">1972</option>
            <option value="1971">1971</option>
            <option value="1970">1970</option>
            <option value="1969">1969</option>
            <option value="1968">1968</option>
            <option value="1967">1967</option>
            <option value="1966">1966</option>
            <option value="1965">1965</option>
            <option value="1964">1964</option>
            <option value="1963">1963</option>
            <option value="1962">1962</option>
            <option value="1961">1961</option>
            <option value="1960">1960</option>
            <option value="1959">1959</option>
            <option value="1958">1958</option>
            <option value="1957">1957</option>
            <option value="1956">1956</option>
            <option value="1955">1955</option>
            <option value="1954">1954</option>
            <option value="1953">1953</option>
            <option value="1952">1952</option>
            <option value="1951">1951</option>
            <option value="1950">1950</option>
            <option value="1949">1949</option>
            <option value="1948">1948</option>
            <option value="1947">1947</option>

相反,它应该是:

<select name="Year">
            <option value="Year">Year</option>
            <option value="2012">2012</option>
            <option value="2011">2011</option>
            <option value="2010">2010</option>
            <option value="2009">2009</option>
            <option value="2008">2008</option>
            <option value="2007">2007</option>
            <option value="2006">2006</option>
            <option value="2005">2005</option>
            <option value="2004">2004</option>
            <option value="2003">2003</option>
            <option value="2002">2002</option>
            <option value="2001">2001</option>
            <option value="2000">2000</option>
            <option value="1999">1999</option>
            <option value="1998">1998</option>
            <option value="1997">1997</option>
            <option value="1996">1996</option>
            <option value="1995">1995</option>
            <option value="1994">1994</option>
            <option value="1993">1993</option>
            <option value="1992">1992</option>
            <option value="1991">1991</option>
            <option value="1990">1990</option>
            <option value="1989">1989</option>
            <option value="1988">1988</option>
            <option value="1987">1987</option>
            <option value="1986">1986</option>
            <option value="1985">1985</option>
            <option value="1984">1984</option>
            <option value="1983">1983</option>
            <option value="1982">1982</option>
            <option value="1981">1981</option>
            <option value="1980">1980</option>
            <option value="1979">1979</option>
            <option value="1978">1978</option>
            <option value="1977">1977</option>
            <option value="1976">1976</option>
            <option value="1975">1975</option>
            <option value="1974">1974</option>
            <option value="1973">1973</option>
            <option value="1972">1972</option>
            <option value="1971">1971</option>
            <option value="1970">1970</option>
            <option value="1969">1969</option>
            <option value="1968">1968</option>
            <option value="1967">1967</option>
            <option value="1966">1966</option>
            <option value="1965">1965</option>
            <option value="1964">1964</option>
            <option value="1963">1963</option>
            <option value="1962">1962</option>
            <option value="1961">1961</option>
            <option value="1960">1960</option>
            <option value="1959">1959</option>
            <option value="1958">1958</option>
            <option value="1957">1957</option>
            <option value="1956">1956</option>
            <option value="1955">1955</option>
            <option value="1954">1954</option>
            <option value="1953">1953</option>
            <option value="1952">1952</option>
            <option value="1951">1951</option>
            <option value="1950">1950</option>
            <option value="1949">1949</option>
            <option value="1948">1948</option>
            <option value="1947">1947</option>