CodeColorer 和 WP-Syntax 这两个插件都挺好用，都可以在插件里搜索到。

注意：下面所有的双引号，复制后请替换成英文的双引号

WP-Syntax使用方法

<pre lang="html" line="1" escaped="true">
//这里添加需要插入的代码……
</pre>

其中lang=”html”是代码语言（这里是html，可根据插入的语言修改如php），line=”1″是指是否显示行号，设置为1为显示0则不显示，escaped=”true”是代码是为了防止代码被转义，设置为false则被转义。

支持的语言如下：abap, actionscript, actionscript3, ada, apache, applescript, apt_sources, asm, asp, autoit, avisynth, bash, bf, bibtex, blitzbasic, bnf, boo, c, c_mac, caddcl, cadlisp, cil, cfdg, cfm, cmake, cobol, cpp-qt, cpp, csharp, css, d, dcs, delphi, diff, div, dos, dot, eiffel, email, erlang, fo, fortran, freebasic, genero, gettext, glsl, gml, bnuplot, groovy, haskell, hq9plus, html4strict, idl, ini, inno, intercal, io, java, java5, javascript, kixtart, klonec, klonecpp, latex, lisp, locobasic, lolcode lotusformulas, lotusscript, lscript, lsl2, lua, m68k, make, matlab, mirc, modula3, mpasm, mxml, mysql, nsis, oberon2, objc, ocaml-brief, ocaml, oobas, oracle11, oracle8, pascal, per, pic16, pixelbender, perl, php-brief, php, plsql, povray, powershell, progress, prolog, properties, providex, python, qbasic, rails, rebol, reg, robots, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, tcl, teraterm, text, thinbasic, tsql, typoscript, vb, vbnet, verilog, vhdl, vim, visualfoxpro, visualprolog, whitespace, whois, winbatch, xml, xorg_conf, xpp, z80

CodeColorer的使用方法
<code lang="lang_name">这里是代码</code>
lang_name表示语言名称，根据插入语言的类型写入适当的值，例如要高亮PHP代码，则用下面的语句：
<code lang="php">echo “This is php code”;</code>

CodeColorer支持的语言有:
abap, actionscript, actionscript3, ada, apache, applescript, apt_sources, asm, asp, autoit, avisynth, bash, basic4gl, bf, bibtex, blitzbasic, bnf, boo, c, c_mac, caddcl, cadlisp, cfdg, cfm, cil, cmake, cobol, cpp-qt, cpp, csharp, css, d, dcs, delphi, diff, div, dos, dot, eiffel, email, erlang, fo, fortran, freebasic, genero, gettext, glsl, gml, gnuplot, groovy, haskell, hq9plus, html4strict, idl, ini, inno, intercal, io, java, java5, javascript, kixtart, klonec, klonecpp, latex, lisp, locobasic, lolcode, lotusformulas, lotusscript, lscript, lsl2, lua, m68k, make, matlab, mirc, modula3, mpasm, mxml, mysql, nsis, oberon2, objc, ocaml-brief, ocaml, oobas, oracle11, oracle8, pascal, per, perl, php-brief, php, pic16, pixelbender, plsql, povray, powershell, progress, prolog, properties, providex, python, qbasic, rails, rebol, reg, robots, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, tcl, teraterm, text, thinbasic, tsql, typoscript, vb, vbnet, verilog, vhdl, vim, visualfoxpro, visualprolog, whitespace, whois, winbatch, xml, xorg_conf, xpp, yaml, z80.