![]() May be by following functions will be easier to extract the needed sub parts from a string: The start and length arguments can also be negative numbers.Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ![]() The third argument specifies the length of the string to be returned. 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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