PHP - 드롭에게 PRE-선택 아래 옵션 다음 URL의 예를 사용

Question

: http://www.kavoir.com/2009/02/php-drop-down-list.html

I 메뉴 드롭 다운이 가질 수있는 방법 등의 '애플'과 같은 옵션 중 하나를 사전을-선택?

편집 : 추가 정보

function showForm() 

{ 
global $sProduct, $name, $product, $header_file, $footer_file, $form_width, $form_background, $form_border_color, $form_border_width, $form_border_style, $cell_padding, $left_col_width, $font_size; 
include $header_file; 
echo <<<EOD 

<form method="post" class="cForm"> 
<table style="width:{$form_width}; padding:20px 7px 0px 7px; font-size:{$font_size}; background-color:{$form_background};" class="contactForm"> 
<tr> 
<td style="width:{$left_col_width}; text-align:left; vertical-align:center; padding:{$cell_padding}; font-weight:bold; {$name[3]}">{$name[0]}</td> 
<td style="text-align:left; vertical-align:top; padding:{$cell_padding};"><input type="text" name="{$name[1]}" value="{$name[2]}" size="25"/></td> 
</tr> 
<tr> 
<td style="width:{$left_col_width}; text-align:left; vertical-align:center; padding:{$cell_padding}; font-weight:bold;">{$product[0]}</td> 
<!--<td style="text-align:left; vertical-align:top; padding:{$cell_padding};"><select name="{$product[1]}">--> 
<td style="text-align:left; vertical-align:top; padding:{$cell_padding};"> 
<select name="{$product[1]}"> 
    <option value="1"></option> 
    <option value="2">item 2</option> 
    <option value="3">item 3</option> 
    <option value="4">item 4</option> 
    <option value="5">item 5</option> 
    <option value="6">item 6</option> 
</select> 
</td> 
</tr> 
<td style="width:{$left_col_width}; text-align:left; vertical-align:center; padding:{$cell_padding}; font-weight:bold; {$code[3]}">{$code[0]}</td> 
<td style="text-align:left; vertical-align:top; padding:{$cell_padding};"><input type="submit" name="submit" value="Submit" style="border:1px solid #999;background:#E4E4E4;" /></td> 
</tr> 
<tr> 
<td colspan="2" style="font-size:10px; text-align:left; vertical-align:middle; padding:{$cell_padding};"> 
0:(var_product[0] = ({$product[0]})) <br/> 
1:(var_product[1] = ({$product[1]})) <br/> 
2:(var_product[2] = ({$product[2]}))<br/> 
3:(var_product[3] = ({$product[3]}))<br/> 
4:(var_sProduct = ({$sProduct}))<br/> 
</td> 
</tr> 
</table> 
</form> 

EOD; 

Answer 1

기본값이 무엇인지 정의하는 generateSelect 함수에 다른 매개 변수를 전달합니다. 옵션의 id 또는 name 중 하나를 사용하여이 작업을 수행 할 수 있습니다. 다음을 위해, 나는 더 명확하게하기 위해 name을 사용할 것이다.

function generateSelect($name = '', $options = array(), $default = '') { 
    $html = '<select name="'.$name.'">'; 
    foreach ($options as $option => $value) { 
     if ($option == $default) { 
      $html .= '<option value='.$value.' selected="selected">'.$option.'</option>'; 
     } else { 
      $html .= '<option value='.$value.'>'.$option.'</option>'; 
     } 
    } 

    $html .= '</select>'; 
    return $html; 
} 

/* And then call it like */ 
$html = generateSelect('company', $companies, 'Apple'); 

Answer 2

당신이 당신의 옵션을 에코 다음과 같이 에코 경우 :

<option value="apple" selected="selected">Apple</option> 

또는 다음과 같이 JS를 사용할 수 있습니다

var dropDownList = document.getElementById('dropDownListId'); 
dropDownList.options[optionIndex].selected = true; 

내가 불통 이 기능은 약간 있지만 사용할 수는 있습니다 :

function generateSelect($name, $options, $optionToSelect) { 
    $html = '<select name="'.$name.'">'; 
    foreach ($options as $option => $value) { 
     if($value == $optionToSelect) 
      $html .= '<option value="'.$value.'" selected="selected">'.$value.'</option>'; 
     else 
      $html .= '<option value="'.$value.'">'.$value.'</option>'; 
    } 
    $html .= '</select>'; 
    return $html; 
} 

Answer 3

<?php 
$selected_fruit= 2; 

$opt_txt=function($opt_val){   
    $selected=($selected_fruit==$opt_val)?"selected=selected":""; 
    $opt_txt= "value= \"".$opt_val."\" ".$selected; 
    echo $opt_txt; 
    } 
?> 

<select name="{$product[1]}"> 
    <option <?php $opt_txt(0) ?> ></option> 
    <option <?php $opt_txt(2) ?> >apple</option> 
    <option <?php $opt_txt(3) ?> >banana</option> 
    <option <?php $opt_txt(4) ?> >pear</option> 
    <option <?php $opt_txt(5) ?> >peach</option> 
    <option <?php $opt_txt(6) ?> >apricot</option> 
</select>