(一)
$new_str
=
str_replace("xxx",
"bbb",
"aaaxxxaaa");
echo
$new_str;
//aaabbbaaa
(二)
$new_str
=
str_replace(array("xxx",
"yyy"),
"bbb",
"aaaxxxaaayyyaaa");
echo
$new_str;
//aaabbbaaabbbaaa
(三)
$new_str
=
str_replace(array("xxx",
"yyy"),
array("bbb",
"ccc"),
"aaaxxxaaayyyaaa");
echo
$new_str;
//aaabbbaaacccaaa
当然,str_replace的第三个参数也可以是数组
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