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Built-In Functions Substr

The substr() function returns the sub-string starting at a specified position (integer offset) in a target string

$myString = "Hello World";
$val = substr( $myString, 6 );
# Yields "World"

An optional length parameter may be specified to shorten the extracted sub-string

$myString = "Hello World";
$val = substr( $myString, 6, 2 );
# Yields "Wo"