PHP startsWith and endsWith自定义函数代码
[PHP] 纯文本查看 复制代码 function startsWith($haystack, $needle) {
// search backwards starting from haystack length characters from the end
return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== FALSE;
}
function endsWith($haystack, $needle) {
// search forward starting from end minus needle length characters
return $needle === "" || (($temp = strlen($haystack) - strlen($needle)) >= 0 && strpos($haystack, $needle, $temp) !== FALSE);
}
[PHP] 纯文本查看 复制代码 startsWith("abcdef", "ab") -> true
startsWith("abcdef", "cd") -> false
startsWith("abcdef", "ef") -> false
startsWith("abcdef", "") -> true
startsWith("", "abcdef") -> false
endsWith("abcdef", "ab") -> false
endsWith("abcdef", "cd") -> false
endsWith("abcdef", "ef") -> true
endsWith("abcdef", "") -> true
endsWith("", "abcdef") -> false
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