Determines whether a character is in a string in PHP

Tag: Ring POS class starts start return function Art font

1. Strpos () -finds the position of the first occurrence of a string in another string (case-sensitive)
2. Stripos () -finds the position of the first occurrence of a string in another string (case insensitive)
3. Strrpos () -finds the last occurrence of a string in another string (case-sensitive)
4. Strripos () -finds the last occurrence of a string in another string (case insensitive)

Parameters:
Strripos (string,find,start)
string: Required. Specifies the string to search for.
find: Required. Specifies the character to find.
start: Optional. Specify where to start the search.

Example:

#

<?php
$str =  ' abcdef ';
$find    =  ' abc ';
$pos  = strpos ($mystring,  $findme);

//  Note that this is used  === cannot use = =
//  because if not The string returns False if the string is at the beginning of the string and returns 0 in order to differentiate between 0 and false, you must use the equivalent operator = = = or! ==

if  ($pos  === false)  {
     echo  "$find not in $str";
} else {
    echo  " $ find In $ str ";
}
?

< Span class= "example-contents" >2#

<?php
$string = ‘abcdef abcdef‘;
$find = strpos($string,‘a‘,1); // $find = 7, 不是 0
?>

Determines whether a character is in a string in PHP