[#boost-urls-params_encoded_base-find_last-0b]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_encoded_base.adoc[params_encoded_base]::find_last
:relfileprefix: ../../../
:mrdocs:

Find a matching key

== Synopses

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_base.hpp#L496[boost/url/params_encoded_base.hpp]>`

Find a matching key


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_base/find_last-05.adoc[find_last](
    xref:boost/urls/pct_string_view.adoc[pct_string_view] key,
    xref:boost/urls/ignore_case_param.adoc[ignore_case_param] ic = {}) const noexcept;
----

[.small]#xref:boost/urls/params_encoded_base/find_last-05.adoc[_» more..._]#

Find a matching key


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_base/find_last-0d.adoc[find_last](
    xref:boost/urls/params_encoded_base/iterator.adoc[iterator] before,
    xref:boost/urls/pct_string_view.adoc[pct_string_view] key,
    xref:boost/urls/ignore_case_param.adoc[ignore_case_param] ic = {}) const noexcept;
----

[.small]#xref:boost/urls/params_encoded_base/find_last-0d.adoc[_» more..._]#

== Exceptions

[cols=2]
|===
| Name
| Thrown on
| `system_error`
| `key` contains an invalid percent‐encoding.
|===

== Return Value

an iterator to the param

== Parameters

[cols=2]
|===
| Name
| Description
| *key*
| The key to match. By default, a case‐sensitive comparison is used.
| *ic*
| An optional parameter. If the value xref:boost/urls/ignore_case.adoc[`ignore_case`] is passed here, the comparison is case‐insensitive.
| *before*
| One past the position to begin the search from. This can be `end()`.
|===


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