如何在列表列表中拆分 3 个空格连字符

Question

代码：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{listings}
\begin{document}
\begin{lstlisting}[language=PHP,breaklines]
$a === $b;
\end{lstlisting}
\end{document}

输出：

如何分别显示空格？

Answer 1

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{listings}
\begin{document}

\begin{lstlisting}[language=PHP,breaklines,columns=flexible]
$a === $b;
\end{lstlisting}

\begin{lstlisting}[language=PHP,breaklines,basicstyle=\ttfamily]
$a === $b;
\end{lstlisting}

\end{document}

Answer 2

您可以滥用该literate键来破坏连字符。

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{listings}
\begin{document}

\begin{lstlisting}[language=PHP,breaklines]
$a === $b;
\end{lstlisting}

\begin{lstlisting}[language=PHP,breaklines,literate={===}{={}={}=}3] % <--- !
$a === $b;
\end{lstlisting}

\end{document}