PHP's stripos in TypeScript

How to use

Install via yarn add locutus and import: import { stripos } from 'locutus/php/strings/stripos'.

Or with CommonJS: const { stripos } = require('locutus/php/strings/stripos')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

#	code	expected result
1	stripos('ABC', 'a')	0

Here's what our current TypeScript equivalent to PHP's stripos looks like.

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function stripos(fHaystack: string, fNeedle: string, fOffset?: number): number | false {
  //      discuss at: https://locutus.io/php/stripos/
  // parity verified: PHP 8.3
  //     original by: Martijn Wieringa
  //      revised by: Onno Marsman (https://twitter.com/onnomarsman)
  //       example 1: stripos('ABC', 'a')
  //       returns 1: 0

  const haystack = (fHaystack + '').toLowerCase()
  const needle = (fNeedle + '').toLowerCase()
  let index = 0

  if ((index = haystack.indexOf(needle, fOffset)) !== -1) {
    return index
  }

  return false
}

export function stripos(fHaystack, fNeedle, fOffset) {
  //      discuss at: https://locutus.io/php/stripos/
  // parity verified: PHP 8.3
  //     original by: Martijn Wieringa
  //      revised by: Onno Marsman (https://twitter.com/onnomarsman)
  //       example 1: stripos('ABC', 'a')
  //       returns 1: 0

  const haystack = (fHaystack + '').toLowerCase()
  const needle = (fNeedle + '').toLowerCase()
  let index = 0

  if ((index = haystack.indexOf(needle, fOffset)) !== -1) {
    return index
  }

  return false
}

Improve this function

Locutus is a community effort following The McDonald's Theory: we ship first iterations, hoping others will improve them. If you see something that could be better, we'd love your contribution.

View on GitHub · Edit on GitHub · View Raw

---

« More PHP strings functions

Star