[英]Double quotes ,single quotes problem in javascript of html tag in php echo statement
我使用echo语句和选择标签的onchange我使用了javascript
echo('<select name="type" onchange="(return location.href='.?&class=.'+this.value;)" id="manage_ads">
<option value="ads">Paid To Click Ads</option>
<option value="banner_ads">Banner Ad</option>
<option value="featured_ads">Featured Text Ads</option>
<option value="featured_link">Featured Link Ads</option>
</select>');
它显示错误,因为href ='这里单引号与echo语句冲突。
但如果我在另一个javascript页面中使用它,那么该函数无法正常工作,因为它会给出classundefined的错误
function check()
{
return location.href='.?&class=.'+this.value;
}
那么有什么方法可以使用这个功能
这些通常是跳进和退出PHP模式的完美场景:
?>
<select name="type" onchange="(return location.href='.?&class=.'+this.value;)" id="manage_ads">
<option value="ads">Paid To Click Ads</option>
<option value="banner_ads">Banner Ad</option>
<option value="featured_ads">Featured Text Ads</option>
<option value="featured_link">Featured Link Ads</option>
</select>
<?php
虽然使用了inoften,但这个策略甚至可以在函数和方法的范围内实现:
function createSelectControl($name, array $options) {
?>
<select name="<?= $name ?>">
<?php
foreach ($options as $name => $value) {
createSelectOption($name, $value);
}
?>
</select>
<?php
}
function createSelectOption($name, $value) {
?>
<option value="<?= $value ?>"><?= $name ?></option>
<?php
}
关键是:不要用PHP echo
大量的HTML( 或任何相关的东西 )。 它将使您免于接下来不可避免的引用不匹配问题。
你忘了逃避它们
echo('<select name="type" onchange="(return location.href=\'.?&class=.\'+this.value;)" id="manage_ads">
<option value="ads">Paid To Click Ads</option>
<option value="banner_ads">Banner Ad</option>
<option value="featured_ads">Featured Text Ads</option>
<option value="featured_link">Featured Link Ads</option>
</select>');
试试这个,在PHP中你必须使用反斜杠转义单引号
echo('<select name="type" onchange="(return location.href=\'?&class=\'+this.value;)" id="manage_ads">
<option value="ads">Paid To Click Ads</option>
<option value="banner_ads">Banner Ad</option>
<option value="featured_ads">Featured Text Ads</option>
<option value="featured_link">Featured Link Ads</option>
</select>');
你可以像这样逃避单引号:
echo('<select name="type" onchange="(return location.href=\'.?&class=.\'"+this.value;)" ...
将您想要的单引号转义为字符串中的文字。 像这样:
echo('<select name="type" onchange="(return location.href=\'.?&class=.\'+this.value;)" id="manage_ads">
<option value="ads">Paid To Click Ads</option>
<option value="banner_ads">Banner Ad</option>
<option value="featured_ads">Featured Text Ads</option>
<option value="featured_link">Featured Link Ads</option>
</select>');
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