<?php
$mystring = 'abc';
$findme = 'a';
$pos = strpos($mystring, $findme);// Note our use of ===. Simply == would not work as expected
// because the position of 'a' was the 0th (first) character.
if ($pos === false) {
echo "The string '$findme' was not found in the string '$mystring'";
} else {
echo "The string '$findme' was found in the string '$mystring'";
echo " and exists at position $pos";
}// We can search for the character, ignoring anything before the offset
$newstring = 'abcdef abcdef';
$pos = strpos($newstring, 'a', 1); // $pos = 7, not 0
?>
$mystring = 'abc';
$findme = 'a';
$pos = strpos($mystring, $findme);// Note our use of ===. Simply == would not work as expected
// because the position of 'a' was the 0th (first) character.
if ($pos === false) {
echo "The string '$findme' was not found in the string '$mystring'";
} else {
echo "The string '$findme' was found in the string '$mystring'";
echo " and exists at position $pos";
}// We can search for the character, ignoring anything before the offset
$newstring = 'abcdef abcdef';
$pos = strpos($newstring, 'a', 1); // $pos = 7, not 0
?>
后者与前者的功能,返回值都一样,只是不区分大小写。strstr("母字符串", "子字符串")用来查找子字符串在母字符串中第一次出现的位置,
并返回母字符串中从子字符串开始到母字符串结束的部分。
如果找不到子字符串,则返回空。