Add a new function to find the position of a substring in a string

Author: sebprt

README.md

@@ -24,3 +24,4 @@ foo: '@=format("%s", "output")'
 * `fileName(string $string) : string` => Returns information about a file path
 * `dateTime(string $string) : string` => Returns new DateTimeImmutable object formatted according to the specified format
 * `formatDate(string $string) : string` => Returns date formatted according to given format
+* `position(string $haystack, string $needle, int $offset) : int|false` => Find the position of the first occurrence of a substring in a string

src/StringExpressionLanguageProvider.php

@@ -17,6 +17,7 @@ public function getFunctions(): array
             ExpressionFunction::fromPhp('substr', 'search'),
             ExpressionFunction::fromPhp('strtoupper', 'toUpperCase'),
             ExpressionFunction::fromPhp('number_format', 'formatNumber'),
+            ExpressionFunction::fromPhp('strpos', 'position'),
             new FileName('fileName'),
             new DateTime('dateTime'),
             new FormatDate('formatDate'),