What does the Wordpress “_e()” function do?

问题:

I have these all over my theme, and when if I delete them, there nothing happens to the theme. What does it do? Should I leave them in or are they unnecessary? I want to optimize my site to load faster, so this is why I'm asking.

回答1:

https://developer.wordpress.org/reference/functions/_e/

In Wordpress, strings in the php files are marked for translation to other languages, and localization using two “tags” which are actually functions. They are:

__() _e()

回答2:

They are used for localization in Wordpress themes. If you're only using one language for your theme, you don't need them.

回答3:

These are for Wordpress localization.

Here is their documentation: http://codex.wordpress.org/Function_Reference/_e

Also a few links on localization in general on wordpress to put the _e's in context:

• http://make.wordpress.org/docs/plugin-developer-handbook/plugin-components/internationalization/
• http://codex.wordpress.org/I18n_for_WordPress_Developers

回答4:

It is a WordPress Function used for localization. See the WordPress Docs for localization.

With this function you can output/assign "hardcoded" strings within your theme/plugin/code that are translateable (with .mo / .po files or plugins like WPML String Translation).

The function __( 'My Text', 'my-text-domain' ); assigns a string "My Text" that is translateable. 'my-text-domain' is the text-doamin the string is referenced to. This function does not echo anything!

The function _e( 'My Text', 'my-text-domain' ); is almost the same but it echoes your string directly.

WordPress Offers several other functions for localization, take a look into the Codex (link on top of my answer).

回答5:

Those are WordPress library function used on localization in Wordpress themes. Its recommended to use escapes function as much as possible in theme and plugins for safety.

__() = Return the translated string
_e() = echo the translated string
esc_html__() = Escapes & return the translation string use in HTML output
esc_html_e() = Escapes & echo the translation string use in HTML output
esc_attr__() = Escapes & return the translation string use in an attribute
esc_attr_e() = Escapes & echo the translation string use in an attribute

_n() = Retrieve the plural or single form based on the amount.

_x() = Retrieve translated string with gettext context
_ex() = echo translated string with gettext context
esc_attr_x() = Escapes & return translated string with gettext context use in an attribute
esc_html_x() = Escapes & return translated string with gettext context use in HTML output

回答6:

The _e() function display translated text.

_e( string $text, string $domain = 'default' )

You could found more information about at the Wordpress Documentation: _e() function

回答7:

Actually, from my experience, I find that _e() is a function. It is similar to:

<?php function _e($txt) { echo $txt; }

It seems to me that if you eliminate it, you run the risk of your text not even showing up. From the uses I have seen, though, it is comments to the Wordpress user to remind them to add information to the area, like the footer, header, or whatever. So eliminating may only remove all the hints the theme has built in for you.

回答8:

It seems to me that if you eliminate it, you run the risk of your text not even showing up. From the uses I have seen, though, it is comments to the Wordpress user to remind them to add information to the area, like the footer, header, or whatever. So eliminating may only remove all the hints the theme has built in for you.