PHP reference problems

PHP reference problem I reference the function cut () of file B in file A, and write include_once (& quot; B. php & quot;); then call & lt ;? Phpechocut ($ arr [title], 28 );? & Gt; but I don't know why I always run the error Fatalerror: Calltound PHP reference.
I reference the function cut () of file B in file A, write include_once ("B. php") on page A, and then call But I don't know why I always run the error Fatal error: Call to undefined function cut () in D: \ XAMPP1.7.3 \ xampp \ htdocs \ web \ index. php on line 233
Is there no CUT function defined? But I clearly defined it. When you view the source file on page A, the section that should show the result shows my CUT function code.
The CUT function is Function cut ($ Str, $ Length) {// $ Str is the string to be truncated, and $ Length is the Length to be truncated.

Global $ s;
$ I = 0;
$ L = 0;
$ Ll = strlen ($ Str );
$ S = $ Str;
$ F = true;

While ($ I <= $ ll ){
If (ord ($ Str {$ I}) <0x80 ){
$ L ++; $ I ++;
} Else if (ord ($ Str {$ I}) <0xe0 ){
$ L ++; $ I + = 2;
} Else if (ord ($ Str {$ I}) <0xf0 ){
$ L + = 2; $ I + = 3;
} Else if (ord ($ Str {$ I}) <0xf8 ){
$ L + = 1; $ I + = 4;
} Else if (ord ($ Str {$ I}) <0xfc ){
$ L + = 1; $ I + = 5;
} Else if (ord ($ Str {$ I}) <0xfe ){
$ L + = 1; $ I + = 6;
}

If ($ l >=$ Length-1) & $ f ){
$ S = substr ($ Str, 0, $ I );
$ F = false;
}

If ($ l> $ Length) & ($ I <$ ll )){
$ S = $ s. '...'; break; // if it is intercepted, the end of the string is omitted with the symbol "..."
}
}
Return $ s;
}
?>

I don't know what I have to say. I hope someone can help me.

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Have you enabled php tag disconnection? the php tag in your file A should be ------ Solution --------------------
Discussion

Have you enabled php tag disconnection? the php tag in your file A should be