How you take a substring from a given string in PHP?

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If you know the position of a substring in a given string, you can take the substring out by the substr() function. Here is a PHP script on how to use substr():

$string = "beginning";
print("Position counted from left: ".substr($string,0,5)." ");
print("Position counted form right: ".substr($string,-7,3)." ");

This script will print:
Position counted from left: begin
Position counted form right: gin
substr() can take negative starting position counted from the end of the string.
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