PhpStorm

General

Search everywhere

`↑ Shift` then `↑ Shift`

All hotkeys for PhpStorm

General Run anything	`Ctrl` then `Ctrl`
General Search everywhere	`↑ Shift` then `↑ Shift`
General Find action	`Ctrl` + `↑ Shift` + `A`
General Find a class, file or symbol	`Ctrl` + `N`
General Find a class, file or symbol	`Ctrl` + `↑ Shift` + `N`
General Find a class, file or symbol	`Ctrl` + `↑ Shift` + `Alt` + `N`
General View recent files	`Ctrl` + `E`
General Show intention actions	`Alt` + `⤶ Enter`
General Basic code completion (Complete names of classes, methods, fields and keywords within the visibility scope)	`Ctrl` + `Space`
General Extend or shrink selection	`Ctrl` + `W`
General Extend or shrink selection	`Ctrl` + `↑ Shift` + `W`
General Add / remove line or block comment	`Ctrl` + `/`
General Add / remove line or block comment	`Ctrl` + `↑ Shift` + `/`
General Highlight usages in file	`Ctrl` + `↑ Shift` + `F7`
Advanced features Refactor this	`Ctrl` + `↑ Shift` + `Alt` + `T`
Advanced features VCS operations	`Alt` + `
Advanced features Resize a vertical tool window	`Ctrl` + `↑ Shift` + `← →`
Advanced features Resize a horizontal tool window	`Ctrl` + `↑ Shift` + `↑ ↓`

Similar combinations for other applications

IntelliJ IDEA (macOS)

Search everywhere

Search and replace

`↑ Shift` then `↑ Shift`

IntelliJ IDEA (Windows, Linux)

Search everywhere

Search and replace

`↑ Shift` then `↑ Shift`

Android

Activate caps-lock; press Shift once more to exit

Typing

`↑ Shift` then `↑ Shift`