php lost some path of string after submition using ajax post - php

Question

I am trying to submit a comment using ajax post with php, it's working very fine as i expected it to but when i try to submit some sting that contain & it lossess path of the sting only show from beginging till where the and is.
I really don't know how to fix this, i have no idea about what is the problem please i need help.
See example
MY ajax
<script>
$('#submitcomment').on('click', function(){
try{
var message = $('.commentTextinput').val();
var key= $(this).attr('data-keyname');
$.ajax({
url: UrlExistsA('snippet/snippetcomment'),
data: 'message=' + message + '&key=' + key,
type: 'POST',
beforeSend: function(){
$('#submitcomment').html('Wait....');
},
success: function(data){
$('tr.replyList:last-child').after(data);
$('.commentTextinput').val('');
$('#submitcomment').html('Comment');
},
error: function(data){
alert('Processing Error' + '<br/>' + data);
}
});
}catch(err){alert(err.message);}
finally{}
});
</script>
Here is test php
<?php
if(isset($_POST['message'])){
$postReply = htmlentities($_POST['message'], ENT_QUOTES, "UTF-8");
echo $postReply;
}
The above will output this
tomorrow we will run faster, stretch out our arms farther... And then
one fine morning
But the original string posted was
tomorrow we will run faster, stretch out our arms farther... And then
one fine morning— So we beat on, boats against the current,
borne back ceaselessly into the past.
also when i tried to submit &&&&&&&&&&&&&&&&&&&&&&& it return empty But when i echo the above string without using ajax it was very okay

Answer 1

You need to call encodeURIComponent to encode special characters in the parameter string. & is the separator between parameters, so you need to encode it.
data: 'message=' + encodeURIComponent(message) + '&key=' + encodeURIComponent(key),
But a simpler way is to use an object instead of a string, then jQuery will encode it automatically.
data: { message: message, key: key },