How to Make Strpos Case Insensitive

How to make strpos case insensitive

You're looking for stripos()

If that isn't available to you, then just call strtolower() on both strings first.

EDIT:

stripos() won't work if you want to find a substring with diacritical sign.

For example:

stripos("Leży Jerzy na wieży i nie wierzy, że na wieży leży dużo JEŻY","jeży"); returns false, but it should return int(68).

How to use PHP strpos not case sensitive?

Yeah, stripos() is what you're looking for. Here's the manual page.

PHP strpos() IS case sensitive for me

stripos is the function that you are looking for. strpos is case sensitive

http://php.net/manual/en/function.stripos.php

How to perform case insensitive str_contains?

You want a case-insensitive version of str_contains()
The short answer is: There isn't one.

The long answer is: case-sensitivity is encoding and locale dependent. By the time you've added those are information to a hypothetical str_icontains(), you've recreated mb_stripos(). TL;DR - Don't do it.

PHP - String contains

If you need looser matching, use a case insensitive function or regex:

stristr($badge->getName() , $_POST['name'])

or

if( ! preg_match("/" . $_POST['name'] . "/i",$badge->getName()) ) {

In these suggestions stristr is the case insensitive version of strstr and /i is the case insensitive flag for regex

Contains case insensitive

Add .toUpperCase() after referrer. This method turns the string into an upper case string. Then, use .indexOf() using RAL instead of Ral.

if (referrer.toUpperCase().indexOf("RAL") === -1) { 

The same can also be achieved using a Regular Expression (especially useful when you want to test against dynamic patterns):

if (!/Ral/i.test(referrer)) {
// ^i = Ignore case flag for RegExp

strstr() function like, that ignores upper or lower case

From the manpage for strstr:

STRSTR(3)           Linux Programmer's Manual           STRSTR(3)

NAME
strstr, strcasestr - locate a substring

SYNOPSIS
#include <string.h>

char *strstr(const char *haystack, const char *needle);

#define _GNU_SOURCE

#include <string.h>

char *<b><u>strcasestr</u></b>(const char *haystack, const char *needle);

DESCRIPTION
The strstr() function finds the first occurrence of the substring needle in
the string haystack. The terminating '\0' characters are not compared.

<b>The strcasestr() function is like strstr(3), but ignores the case of both
arguments.</b>

RETURN VALUE
These functions return a pointer to the beginning of the substring, or NULL if
the substring is not found.

So what you're looking for is strcasestr.



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