我有一个int类型的php变量$a
。现在,如果$a=1;
,那么前两个选项应该只显示,如果$a=2;
那么前三个选项应该只显示,依此类推。我怎样才能做到这一点?
echo "<form class='form-horizontal'>
<fieldset >
<span class='control-group' >
<span class='controls'>
<select id='fl' class='form-control' style='cursor:pointer;'>
<option " . ($default == 0 ? "selected='selected'" : "") . " style='display:none;' value='0'>Select</option>
<option " . ($default == 1 ? "selected='selected'" : "") . " value='1'>Option1</option>
<option " . ($default == 2 ? "selected='selected'" : "") . " value='2'>Option2</option>
</select>
</span>
</span>
<div><button id='mybtn' type='button'>Save</button></div>
</fieldset>
</form>";
答案 0 :(得分:1)
似乎是for
循环的绝佳机会。
// put your values into an array for easy access inside the loop
$options = array(
1 => "Option1",
2 => "Option2",
3 => "Option3",
etc...
);
// output the beginning of the <select> html
echo "<select id='fl' class='form-control' style='cursor:pointer;'>
<option " . ($default == 0 ? "selected='selected'" : "") . " style='display:none;' value='0'>Select</option>";
// loop through items until we reach our limit, set in $a
for ($i = 1; $i < $a; $i++) {
echo "<option " . ($default == $i ? "selected='selected' " : "") . "value='" . $i . "'>" . $options[i] . "</option>";
}
// output the end of the <select> html to close it off
echo "</select>"
答案 1 :(得分:0)
根据$a
之前的echo
值将变量放在变量中,并在echo
<?php
$options = '';
if($a==1)
{
$options = "<option " . ($default == 0 ? "selected='selected'" : "") . " style='display:none;' value='0'>Select</option>
<option " . ($default == 1 ? "selected='selected'" : "") . " value='1'>Option1</option>";
}
else if($a==2)
{
$options = "<option " . ($default == 0 ? "selected='selected'" : "") . " style='display:none;' value='0'>Select</option>
<option " . ($default == 1 ? "selected='selected'" : "") . " value='1'>Option1</option>
<option " . ($default == 2 ? "selected='selected'" : "") . " value='2'>Option2</option>";
}
echo "<form class='form-horizontal'>
<fieldset >
<span class='control-group' >
<span class='controls'>
<select id='fl' class='form-control' style='cursor:pointer;'>
".$options."
</select>
</span>
</span>
<div><button id='mybtn' type='button'>Save</button></div>
</fieldset>
</form>";
?>