"Notice: Undefined offset:", what is the problem? print_r is woring fine

[linuxfreakphp]

the array is getting the values as he should get and from there i send them to $temp (string),but when i'm trying to print them i can't.

 

the array and the string at the end of code saved the values that the code gave them,but i can print the values one by one, but i need the values in string and the array at the end and print $temp(string) in a row without white space. print_r is working but she's not build to this job 

 

can someone look at the code and the result of the code and tell me what seem to be the problem and how to fix that?

the problem start with $txt when the array is getting the values.

the output of this code:http://pastebin.com/0QkzjviW

the code page is attach to this message as php file.

 

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