PHP 手册
后退前进

stristr

(PHP 3 >= 3.0.6, PHP 4, PHP 5)

stristr --  Case-insensitive strstr()

Description

string stristr ( string haystack, string needle )

Returns all of haystack from the first occurrence of needle to the end. needle and haystack are examined in a case-insensitive manner.

If needle is not found, returns FALSE.

If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.

例子 1. stristr() example

<?php
  $email = '[email protected]';
  echo stristr($email, 'e');
// outputs [email protected]
?>

例子 2. Testing if a string is found or not

<?php
  $string = 'Hello World!';
  if(stristr($string, 'earth') === FALSE) {
    echo '"earth" not found in string';
  }
// outputs: "earth" not found in string
?>

例子 3. Using a non "string" needle

<?php
  $string = 'APPLE';
  echo stristr($string, 97); // 97 = lowercase a
// outputs: APPLE
?>

注: 本函数可安全用于二进制对象。

See also strstr(), strrchr(), substr(), and ereg().

后退起点前进
stripslashes上一级strlen