Regular Expressions 101

Pro

(?s)applies the following effective flags to the remainder of the pattern: gs

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

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

varthe literal text var (case sensitive)

Positive Lookahead(?=(?:(?!\/\*|\*\/).)*\*\/)

Non-Capturing Group(?:(?!\/\*|\*\/).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!\/\*|\*\/)

1st Alternative\/\*

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

2nd Alternative\*\/

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.any character

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?s)\$var(?=(?:(?!\/\*|\*\/).)*\*\/)

New

/* other code */
$var = .... ;

/* 
other code
$var = .... ;
other code
*/

$var = .... ;
$var = "*/"
/* 
other * code /
$var = .... ;
other code
*/

// These should not match

$var = "*/";

$var = ...;
// */

Substitution

/* other code */
$var = .... ;

/* 
other code
$var = .... ;
other code
*/

$var = .... ;
$var = "*/"
/* 
other * code /
$var = .... ;
other code
*/

// These should not match

$var = "*/";

$var = ...;
// */