Run command,
uncompress wget.1.10.2.tar.Z
tar xvf wget.1.10.2.tar
crontab -l
20 13,19 * * 1-5 /usr/local/bin/wget -q --no-cache -O /dev/null http://aa.bb.com php
then set library path as below,
export LD_LIBRARY_PATH=/tmp/xx/tools/usr/local/lib
export LIBPATH=$LD_LIBRARY_PATH
Reference