The second argument specifies the position of the trim start. The first argument specifies the string that will be trimmed. It extracts the characters from the string. PHP substr() is one of the most common PHP string functions. If the length parameter is not passed, then the substr() function will return the string starting from the start_position till the end of the string.įor getting the substring of UTF-8 characters, I highly recommend mb_substr. If an integer is negative, it refers to start from start_position and remove the length from the end of the string. If an integer is positive, it refers to start from start_position and extract the length from the beginning.
Let’s pass the start as the negative parameter. Use Negative parameters in substr() function If you omit the string length, it removes the rest of the string. The length parameter is optional, and the number of characters to extract. In case of failure or the empty string, False is returned. If the string is less than start characters long, FALSE will be returned. If the start is negative, the returned string will start at the start‘th character from the end of the string. So, for instance, in the string ‘ abcdef,’ the character at position 0 is ‘ a’, the character at position 2 is ‘ c,’ and so forth. If the start is non-negative, the returned string will start at the start‘th position in the string, counting from zero. The start parameter is required, and it is the position where to start the extraction. The string parameter is required and specifies the string to return a part of. The syntax of the PHP String substr() method is the following. You can grab several characters from a string with a substr() function.
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