The string function strstr(string allString, string occ) returns part of allString from the first occurrence of occ to the end of allString. This function is case-sensitive. stristr() is identical to…
The boolean function isset determines if a variable is set and is not NULL.
The function parse_ini_file() enables us to load in the ini file specified in filename and returns the settings in it in an associative array.
Exception::__toString gives the String representation of the exception.
Exception::getMessage lets us getting the Exception message and Exception::getLine lets us getting the line in which the exception occurred.
The goto statement can be placed to enable jumping inside the PHP program. The target is pointed by a label followed by a colon, and the instruction is specified as…
To be able to verify whether a PHP variable is an instantiated object of a certain class we use instanceof.
!= means inequality (TRUE if $a is not equal to $b) and !== means non-identity (TRUE if $a is not identical to $b).
$a === $b TRUE if $a and $b have the same key/value pairs in the same order and of the same types.
The first is the concatenation operator (‘.’), which returns the concatenation of its right and left arguments. The second is (‘.=’), which appends the argument on the right to the…