So !
When i try to install the PHP-4.0.6 i obtain the following error : I'm use the commande ./configure to create the makefile file before compiling.
checking for flex... lex
checking for yywrap in -ll... no
checking lex output file root... ./configure: lex: command not found
configure: error: cannot find output from lex; giving up
If somebody have an idea, and an answer for my problem.