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How to use Substr () PHP Function in PHP

Definition: The Substr () PHP Function is used to return part of a string. It is written as substr (string, start, optional length);.
The string is whatever string you want to return a portion of.

The start is how many characters in to skip before starting. Setting this to 3 would skip the first three and start returning at the forth character. Setting this to a negative number will start counting backwards from the end of the string.

Length is an optional parameter. If you set this to a positive number, it will return that number of characters. If you set this to a negative number it will count that many numbers from the end of the string and return whatever is left in the middle.

Examples:

//this will return "welcome"
 echo substr('welcome', 1);

 // this will return "come"
 echo substr('welcome', 3);

 
 // this will return 'wel'
 echo substr('welcome', 0, 3);

 
 // this will return 'ome'
 echo substr('welcome', -3);

 
 // this will return 'elcom'
 echo substr('welcome', 1, -1);

 
 // this will return 'lc'
 echo substr('welcome', 2, -3);

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