Today, when you are prompted to perform composer's command inside the window that appears with some critical part of the color, so very curious to study a little, here recorded
In fact, at the command line output with ANSI color escape character font is mainly used to achieve, we look at an example:
? <
Echo "\ 033 [38; 5; 1M red text \ 033 [0m";
display:
In the terminal, ANSI defined Escape code for controlling a screen display screen in the format:
\ 033 [ 38 is;. 5;. 1 m red text \ 033 [ 0 m
Representatives began Settings tab
On behalf of setup is complete label
On behalf of setup parameters
On behalf of the characters to be displayed
Here the start and end tags are fixed, the start tag is "\ 033 [" the meaning is the end tag "m" section in which the parameters can be set according to the parameters in the following table
| Code | effect | Remark |
|---|---|---|
| 0 | Reset / Normal | Close all the properties. |
| 1 | Bold or increase strength | |
| 2 | Weakening (decreased strength) | Not widely supported. |
| 3 | Italic | Not widely supported. Sometimes viewed as reverse video. |
| 4 | Underline | |
| 5 | Slow flashing | Below 150 beats per minute. |
| 6 | Fast flashing | MS-DOS ANSI.SYS; 150 per minute or more; not widely supported. |
| 7 | Anti-significant | Foreground and background color exchange. |
| 8 | hide | Not widely supported. |
| 9 | In addition to planning | Character clear, but marked for deletion. Not widely supported. |
| 10 | The main (default) font | |
| 11–19 | Font substitution | Selects a substitute font {\ DisplayStyle-n-10}  . |
| 20 | Sharp body | Almost no support. |
| 21 | Close bold or underlined double | Close bold is not widely supported; double underline almost no support. |
| 22 | Normal color or intensity | Not strong not weak. |
| 23 | Non-italics, non-angular body | |
| 24 | Close underscore | Remove single and double underlined. |
| 25 | Close Flashing | |
| 27 | Close reverse display | |
| 28 | Close Hide | |
| 29 | In addition to draw close | |
| 30–37 | Set the foreground color | See the following color table. |
| 38 | Set the foreground color | The next parameter is 5;nor 2;r;g;b, below. |
| 39 | The default foreground color | Realized by a specifically defined (according to standard). |
| 40–47 | Set the background color | See the following color table. |
| 48 | Set the background color | The next parameter is 5;nor 2;r;g;b, below. |
| 49 | The default background color | Realized by a specifically defined (according to standard). |
| 51 | Framed | |
| 52 | Encircled | |
| 53 | Overline | |
| 54 | Not framed or encircled | |
| 55 | Close overline | |
| 60 | Underline the right line or ideograms | Almost no support. |
| 61 | Ideograms double underline or double line on the right | |
| 62 | Or scribe line on the left ideogram | |
| 63 | Ideographic double scribe lines or the left-bis | |
| 64 | Ideographic signs focus | |
| 65 | Ideographic property Close | Reset 60- 64of all effect. |
| 90–97 | Set the foreground color bright | aixterm (non-standard). |
| 100–107 | Set bright background color | aixterm (non-standard). |
The table we can see that the parameter set 38 represent foreground set 5 represents the color setting mode is represented by 256 colors 1 that color indication of
In addition to setting the color property outside we can also set other attributes such as underline, and not every property need to set a number of parameters, such as the underscore attribute directly we can add two 4 friends
? < PHP echo "\ 033 [38; 5; 1; 4M red text \ 033 [0m";
Note: Due to the different terminals each system, provided it is inactive, or some effect will be different, the final results to the actual display subject!