前端传过来的json数据有时候会被转化成
$str='[{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":"http://shimao-smt.oss-cn-hangzhou.aliyuncs.com/1539862260910574983338757651936.jpg"}]';
//json_decode($str);会将json字符串转化成object对象形式， json_decode($str,true);则会转化成数组
这个时候使用 json_decode($str,true);是不会成功的，只会输出null，这个时候就需要转化被编译的单双引号了
$str='[{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":"http://shimao-smt.oss-cn-hangzhou.aliyuncs.com/1539862260910574983338757651936.jpg"}]';
echo htmlspecialchars_decode($str);
$str将会被转化成正常的json字符串，如
$str=[{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":""},{"srctype":"0","srcurl":"http://shimao-smt.oss-cn-hangzhou.aliyuncs.com/1539862260910574983338757651936.jpg"}]
这个时候就可以使用 json_decode($str,true);将其转化成数组了；
返回过来将单双引号咋转化成html格式化
使用php函数 htmlspecialchars($str);
参考博客链接:https://blog.csdn.net/qq_41876600/article/details/83152996?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param