Question

我需要保存我的信息，在提交按钮后我需要输出所有信息，我需要选择的选项在我的表单上提交按钮后保持选中状态。我的代码输出信息，但输出包含状态的数字，我需要将状态输出为字符串＆LT; PHP $ name = $ _POST ['name']; $ state = $ _POST ['state']; $ file = $ name。“。txt”; $ txt = $ name。“，”。$ state。“，”; $ wrt = file_put_contents（$ file，$ txt，FILE_APPEND）; $ get_file = file_get_contents（$ file）; $ info = array（$ get_file）; foreach（$ info as $ k =＆gt; $ v） echo $ p; $ x = explode（“，”，$ v）; ？＆GT; ＆lt; form action =“”method =“post”＆gt; ＆lt; input name =“name”value =“＆lt;？php echo $ x ['0'];？＆gt;”/＆gt; ＆lt; select name =“state”＆gt; ＆lt; option value =“0”＆gt;统计＆LT; /选项＆GT; ＆LT; PHP $ province = array（“AA”，“AE”，“AK”，“AL”，“AP”，“AR”，“AS”，“AZ”，“CA”，“CO”，“CT”，“ DC“，”DE“，”FL“，”FM“，”GA“，”GU“，”HI“，”IA“，”ID“，”IL“，”IN“，”KS“，”KY“ ，“LA”，“MA”，“MD”，“ME”，“MH”，“MI”，“MN”，“MP”，“MO”，“MS”，“MT”，“NC”，“ ND“，”NE“，”NH“，”NJ“，”NM“，”NV“，”NY“，”OH“，”OK“，”OR“，”PA“，”PR“，”PW“ ，“RI”，“SC”，“SD”，“TN”，“TX”，“UT”，“VA”，“VI”，“VT”，“WA”，“WI”，“WV”，“ WY'）; foreach（$省为$ k =＆gt; $ v） echo“＆lt; option value ='”。（$ k + 1）。“'＆gt; $ v＆lt; / option＆gt;”; ？＆GT; ＆lt; input type =“submit”name =“submit”value =“trimite”/＆gt; ＆LT; /选择＆GT; ＆LT; /形式＆GT;

Answer 1

请检查以下代码： -

<?php
if(isset($_POST) && !empty($_POST)){
   $name = $_POST['name'];
   $state = $_POST['state'];
   // I don't know what you are doing here through this code
   /* $file = $name.".txt";
   $txt = $name.",".$state.",";
   $wrt = file_put_contents($file, $txt, FILE_APPEND);
   $get_file = file_get_contents($file);

   $info = array($get_file);
   foreach($info as $k => $v)
    echo $p;
    $x = explode(",",$v); */
}
?>
    <form action="" method="post">
        <input name="name" value="<?php if (isset($name)){echo $name;}?>"/>
        <select name="state">
            <option value="0"> Stat</option>
            <?php
            $province = array("AA", "AE" ,'AK" , "AL" , "AP" , "AR" ,    "AS" , "AZ" , "CA" , "CO" , "CT" , "DC" , "DE" , "FL" , "FM" , "GA" , "GU" , "HI" , "IA" , "ID" , "IL" , "IN" , "KS" , "KY" , "LA" , "MA" , "MD" , "ME" , "MH" , "MI" , "MN" , "MP" , "MO" , "MS" , "MT" , "NC" , "ND" , "NE" , "NH" , "NJ" , "NM" , "NV" , "NY" , "OH" , "OK" , "OR" , "PA" , "PR" , "PW" , "RI" , "SC" , "SD" , "TN" , "TX" , "UT" , "VA" , "VI" , "VT" , "WA" , "WI" , "WV" , "WY');
            foreach($province as $k=> $v){
                if(isset($state) && $state == $k){
                    echo "<option value='".$k."' selected = 'selected'>$v</option>";
                }else{
                    echo "<option value='".$k."'>$v</option>";
                }
            }
            ?> 

        </select>
        <input type ="submit" name="submit" value="trimite" style = "margin-top:30px;"/>
    </form>

Answer 2

这样的事情我通常会这样做：

foreach($province as $k => $v) {
    $sel = ($state == $k) ? " selected='selected'" : "";
    echo "<option value='".($k+1)."' {$sel}>{$v}</option>";
}

如何在php中设置<select>的选定选项

2 个答案: