in php concatenation of '<' with any string becomes empty string

Question

I have a PHP socket connection. I send a request and receive its response. The response is in xml format and contains '<'. I want to concatenate strings and build one string of complete response. But when I put '<' at the beginning of string the whole string becomes null:

$s1 = 'hello';
$s2 = '<';
$s = $s2.$s1;
echo 's1: '.$s1.' s2: '.$s2.' s: '.$s;

output:
s1: hello s2: < s:

What should I do?

your code is working and giving same result. what's your problem then? — Death-is-the-real-truth
– Death-is-the-real-truth, Commented May 27, 2015 at 7:09
Use "View source" in your web browser to verify the < is sent correctly to the browser, then learn that a web browser specifically looks for a < character when it receives what it is told is html markup — Mark Baker
– Mark Baker, Commented May 27, 2015 at 7:09
I want the result to be s: <hello instead of empty string @anantkumarsingh — elahehab
– elahehab, Commented May 27, 2015 at 7:14

Sanjay Mohnani · Accepted Answer · 2015-05-27 07:15:16Z

2

These is problem of TAGs that being skipped by Web Browser to display. You can display by converting '<' to "&lt".

PHP has built-in functions for such problem,

String functions

Search for 'HTML' in this page, you will get 4-5 functions that will help you.

Hope that helps !!

answered May 27, 2015 at 7:15

Sanjay Mohnani

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