PHP 怎么输出特殊字符

Question

 echo'<div class="J_TWidget hidden" data-widget-type="Popup" data-widget-config="{
                  'trigger':'.first-$i',
                  'align':{
                  'node':'.first-$i',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }">';
这个输不出啊，里面的变量输不出！
哪位好心的老大帮我看看啊！！谢谢！

Answer 1

$str = <<<EOF
<div class="J_TWidget hidden" data-widget-type="Popup" data-widget-config="{
                  'trigger':'.first-$i',
                  'align':{
                  'node':'.first-$i',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }">
EOF;echo $str;-------------------------echo "<div class=\"J_TWidget hidden\" data-widget-type=\"Popup\" data-widget-config=\"{
                  'trigger':'.first-$i',
                  'align':{
                  'node':'.first-$i',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }\">";--------------------------用 .　操作符连接--------------------------

Answer 2

$i = 2;
echo <<< TXT
<div class="J_TWidget hidden" data-widget-type="Popup" data-widget-config="{
                  'trigger':'.first-$i',
                  'align':{
                  'node':'.first-$i',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }">
TXT;<div class="J_TWidget hidden" data-widget-type="Popup" data-widget-config="{
                  'trigger':'.first-2',
                  'align':{
                  'node':'.first-2',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }">

Answer 3

 echo'<div class="J_TWidget hidden" data-widget-type="Popup" data-widget-config="{
                  'trigger':'.first-$i',
                  'align':{
                  'node':'.first-$i',
                  'offset':[0,0],
                  'points':['bl','tl']
                   } }">';echo 'asd{$i}'; 你这样用单引号 php是不识别其中的变量的 他会把$i当成个字符串。
echo "asd{$i}"；这样的话php会解析$i 这样变量会输出的。