String Processing and Regular Expressions

A PHP string is an indexed sequence of characters, and a single character is reached with square brackets exactly as an array element is, so $name[0] is the first character. strlen() returns the length, therefore a counting loop running from 0 up to strlen(...

--- Exploding means splitting a string into an array based on a specified delimiter/separator. In PHP, this is done using the built-in explode() function. - separator - the delimiter used to split the string (required) - string - the input string to be spli...

In PHP, approximate equality of two strings is performed using the double equals operator (==) with type juggling, or more specifically, the concept of approximate/loose comparison. However, for string similarity/approximate matching, PHP provides the built...

Function Purpose ------ pregmatch() Match a pattern (returns true/false) pregmatchall() Find all matches pregreplace() Replace matched pattern pregsplit() Split string by pattern --- --- --- Pattern Meaning ------ ^ Start of string $ End of string [a-zA-Z] ...