"함수 substrBefore()"의 두 판 사이의 차이

2015년 2월 20일 (금) 17:16 판

substr_before

1 PHP

echo strstr('hello world', 'll', true);
echo strstr('hello world', 'l', true);
echo strstr('hello world', 'x', true); // bool(false)
# he
# he
#

function substr_before($needle, $haystack) { return strstr($haystack, $needle, true); }

echo substr_before('ll', 'hello world');
echo substr_before('l', 'hello world');
echo substr_before('x', 'hello world'); // bool(false)
# he
# he
#

2 같이 보기

@@ 1번째 줄: / 1번째 줄: @@
-;rm_from
 [[category:String]]
+;substr_before
 ==PHP==
 [[category:PHP]]
 <source lang='php'>
-function rm_from($needle, $haystack, $preservation = true) {
+echo strstr('hello world', 'll', true);
-	$pos = strpos($haystack, $needle);
+echo strstr('hello world', 'l', true);
-	if($pos !== false) return substr($haystack, 0, $pos);
+echo strstr('hello world', 'x', true); // bool(false)
-	if($preservation) return $haystack;
+# he
-	return false;
+# he
-}
+#
-$result1 = rm_from('ll', 'hello');
-$result2 = rm_from('al', 'hello');
-$result3 = rm_from('al', 'hello', false);
-echo "[$result1]"; // [he]
-echo "[$result2]"; // [hello]
-echo "[$result3]"; // []
 </source>
 <source lang='php'>
-function rm_from($needle, $haystack, $preservation = true) {
+function substr_before($needle, $haystack) { return strstr($haystack, $needle, true); }
-	$arr = explode($needle, $haystack, 2);
-	if( count($arr)<2 && !$preservation ) return false;
+echo substr_before('ll', 'hello world');
-	return $arr[0];
+echo substr_before('l', 'hello world');
-}
+echo substr_before('x', 'hello world'); // bool(false)
+# he
+# he
+#
 </source>
 ==같이 보기==
-*[[rm_after]]
+*[[함수 substr_until]]
-*[[rm_before]]
+*[[함수 substr_from]]
-*[[rm_until]]
+*[[함수 substr_after]]