"... the search ... was considered valid ... with routine security measures in ports"

On the other hand, there are reasonable searches because of heightened security. 

In Dela Cruz v. People,[172] the search conducted on the accused was considered valid because it was done in accordance with routine security measures in ports.[173] This case, however, should not be construed to apply to border searches. Border searches are not unreasonable per se;[174] there is a "reasonable reduced expectation of privacy" when travellers pass through or stop at airports or other ports of travel.[175]

Precedents/Link/Source: 
[172] G.R. No. 209387, January 11, 2016 < http://sc.judiciary.gov.ph/pdf/web/viewer.html?file=/jurisprudence/2016/january2016/209387.pdf> [Per J. Leonen, Second Division].
[173] Id. at 22.
[174] Dela Cruz v. People, G.R. No. 209387, January 11, 2016 16 [Per J. Leonen, Second Division].
[175] Id. at 17.
[174] Dela Cruz v. People, G.R. No. 209387, January 11, 2016 16 [Per J. Leonen, Second Division].
[175] Id.

2017 Latest Application. READ Full Text.
[2017V331] Veridiano vs PP