trim

Returns a string with whitespace (or other characters) stripped from the beginning and end of string.

main.php

string

Returns the trimmed string

On success:String with specified characters removed from both ends

On failure:Original string if no characters match

By default removes space, tab, newline, carriage return, NULL byte, and vertical tab
Custom character list can be specified in the second parameter
Use range notation (..) to specify character ranges like 'a..z'
Function is binary-safe

String

Replaces all occurrences of search string with replacement string.

replacesanitizeclean

Security

Converts special characters to HTML entities to prevent XSS attacks and ensure safe HTML output.

securityxsssanitize

Validation

Filters a variable with a specified filter, used for validating and sanitizing data.

validatesanitizesecurity

Array

Returns all values from an array with numeric keys, effectively reindexing the array.

valuesreindexclean