![]() ![]() This example shows how the PHP substring function is used with the positive starting position and negative length. Both the starting position and the length will count from the original string’s end and the counting will start from 1.ĥ. Use of Substring Function with Negative Starting Position and Positive Length In the following example, the starting position is -16, and the length is -9. This example shows how the PHP substring function is used with the negative starting position and length. Here, the starting position is extracted by counting from 0 to 21, and the ending position is extracted by counting 9 characters.Ĥ. Use of Substring Function with Negative Starting Position and Length In the following example, the starting position is 21, and the length is 9. This example shows how the PHP substring function is used with a positive starting position and length. When you run the script from the web server, the following output will come.ģ. Use of Substring Function with Positive Starting Position and Length The script, in this case, will return a substring from the starting position to the string’s end. As the starting position is negative, the counting startsed from the end of the string, and the value 1. This example shows how the PHP substring function is used with the negative starting position to extract a substring from a string. Use of Substring Function with Negative Starting Position When you run the script from the web server, the following output will come.Ģ. So when the starting position is 11, the string will be cut from the 12th position to the original string’s end. Below, as the starting position is positive, the counting will start from 0. This example shows how the PHP substring function is used with the positive starting position. ![]() Use of Substring Function with Positive Starting Position Now you know all the parameters used in the PHP substring function, let’s see some examples of how you can extract characters from a string using PHP substring function.ġ. How to Extract a Character From a String using PHP substring function If the $length parameter is not passed, substr() function returns a string from $start till the end of the string.If $length parameter is zero, FALSE or NULL will be returned.Many characters omitts from the end of the string if the length passed is negative. If $length is negative, it begins from $start position and extracts the length from the string’s end.If $length is positive, the returned string contains the number of characters passed in $length parameter beginning from the $start.The input is an integer and it has the following conditions. $length is an optional parameter of the PHP substring function and it specifies the length of the string to be cut. If the $string size is less than $start value, it returns FALSE.If $start has a negative value, the returned string starts from $start character position from the end of the string, and counting begins from -1.If $start has a positive value, the returned string starts from the $start position in the string, and counting begins from zero.The input is an integer and it has following conditions. $string is the second mandatory parameter in PHP substring function and it specifies the starting position from where the substring will be extracted. $string is a mandatory parameter in the PHP substring function and it takes the original string value to extract substring from a string in PHP. It specifies the string that needs to be changed or removed. The syntax of the substr() function contains three parameters, $string, $start and $length, in which the first two are mandatory, and the last one is optional. The PHP substring has the following syntax. Here we will discuss how to extract a substring from a string in PHP using Substr(). The PHP substring function accepts a string and returns a substring from the string. PHP substring, also known as PHP Substr(), is the most common PHP string function and it is used to extract a part of a string. PHP offers a variety of functions, including the PHP substring function, to make it easy to work with different data types. ![]() Advance Microsoft Office Package Training.Red Hat Certified Engineer RHCE Training.Quality Assurance and Quality Control(QA & QC).
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