Programming PHP

header
void header(string header[, bool replace])
Sends header as a raw HTTP header string; must be called before any output is generated
(including blank lines, a common mistake). If the header is a Location header, PHP also
generates the appropriate REDIRECT status code. If replace is specified and false, the header
does not replace a header of the same name; otherwise, the header replaces any header of
the same name.
headers_sent
bool headers_sent( )
Returns true if the HTTP headers have already been sent. If they have not yet been sent,
the function returns false.
hebrev
string hebrev(string string[, int size])
Converts the logical Hebrew text string to visual Hebrew text. If the second parameter is
specified, each line will contain no more than size characters; the function attempts to
avoid breaking words.
hebrevc
string hebrev(string string[, int size])
Performs the same function as hebrev( ), except that in addition to converting string,
newlines are converted to \n. If specified, each line will contain no more than size
characters; the function attempts to avoid breaking words.
highlight_file
bool highlight_file(string filename)
Prints a syntax-colored version of the PHP source file filename using PHP’s built-in syntax
highlighter. Returns true if filename exists and is a PHP source file; otherwise, returns
false.
highlight_string
bool highlight_string(string source)
Prints a syntax-colored version of the string source using PHP’s built-in syntax highlighter.
Returns true if successful; otherwise, returns false.
412 | Appendix A: Function Reference
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