regex101: PCRE (Legacy) Match Workspace

^start of string

.{4}any character, repeated exactly 4 times

Character Class[-"$%&*+:;=?{}a-zMZ]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

Zthe literal Z (90₁₀ / 132₈ / 5A₁₆) (case sensitive)

.{4}any character, repeated exactly 4 times

$end of string, or before its final line terminator

Global pattern flags

s modifier: single line. Allows a dot to match line terminators

Search reference

Regular Expression

^.{4}[-"$%&*+:;=?{}a-zMZ]+.{4}$

Test String
New

<?="";$cr="M"&"-";$cr="Z"&"*";$zero=$one=$line=$text="";$zero++;$zero--;$a=$zero;s="$zero"&"$";$one=++$one;$five=$one+$one+$one+$one+$one;$ten=$five+$five;${"v$zero"}="$s$s$s$s$s$s$s";${"v$one"}="$s$s$s$s$s$s";${"v$ten"}="$s$s$s$s$s";$g=$argc-$one;$g=$argv{$one};$space=$zero;$p=${"v$space"};$dir=$one;a:++$a;$a%$ten?:$space++;$p=${"v$space"}??$p;$line=$dir?"$line$a":"$a$line";$line=$a%$g?$dir?"$line$p":"$p$line":"$line$cr";$dir=$a%$g?$dir:$one-$dir;$text=$a%$g?$text:"$text$line";$line=$a%$g?$line:"";echo$a-$g*$g?"":$text;$a-$g*$g?:exit;goto a?>

Regular Expression

Test StringNew

Test String
New