4 useful tips when creating PHP console tools

Also, if you want to pass a string with line breaks to $argv, enclosing the string in "" or ' will make it work as intended

For example, prepare a source that simply var_dumps the following arguments directly

<?php var_dump($argv);

 
Next, let's run the source code with a string containing line breaks as an argument

php test.php hogehoge 'I'll add a newline' # When you run the above command, the following will be displayed: array(3) { [0] => string(8) "test.php" [1] => string(8) "hogehoge" [2] => string(22) "I'll add a newline" }

 
It looks like a lot of things will be progressing

Adding color to error messages (+bonus)

If you want to have some fun, why not try coloring your error messages?

In Linux, you can make the echoed string colorful and change the background color

This can easily be achieved using the same technique

<?php # hogehogeを赤字で表示するコード echo "\e[31mhogehoge\e[m"; echo "\033[31mhogehoge\033[m";

 Both of the above codes will display hogehoge in red, but at first glance it may not make sense, so
let's break it down a bit.

<?php # hogehogeを赤字で表示するコード echo "\e[31m". "hogehoge". "\e[m"; echo "\033[31m". "hogehoge". "\033[m";

 Let's separate the "hogehoge" part from the rest. Then, we can see a pattern. It seems to be
a good idea to enclose the string you want to change the color of in " \e[**m " or " \033[**m ".

Next, there is the "31" that is only attached to the beginning, and
this is the part that specifies the text color.
31 is divided into 3 and 1, with 3 specifying the text color and 1 specifying red.
In other words, if you want to specify a different text color, change 1 to 2.

I wrote that the 3 in 31 specifies the text color, but if it becomes 4, it specifies the background color
.

<?php echo "\e[41m". "hogehoge". "\e[m"; echo "\033[41m". "hogehoge". "\033[m";

 
The above code will result in a red background

If you want to change both the text color and the background color, place them side by side with a semicolon

<?php echo "\e[31;41m". "hogehoge". "\e[m"; echo "\033[31;41m". "hogehoge". "\033[m";

 
The code above will just display a red rectangle and no text, but it will achieve its purpose

As for more advanced features, you can also use this setting to underline, bold, invert the text and background colors, and make the text blink

<?php echo "\e[31;1m". "hogehoge". "\e[m"; // 赤い太字で表示 echo "\e[31;42;1m". "hogehoge". "\e[m"; // 赤い太字を緑の背景で表示 echo "\e[7m". "hogehoge". "\e[m"; // 文字色と背景色を反転して表示

 
Inversion and other features are less likely to strain your eyes, so you can use them alone

Command options to use when you want to quickly check only specific code

When creating a console tool, you
may suddenly have small questions, such as what form the execution results will be returned in, or whether writing it this way will result in an error. In this article,
we will introduce the PHP option "-r" that you can quickly try in such cases.

For example, let's say you want to change permissions.
You can quickly change it with the chmod function, but if you want to test it, you don't have to bother writing test code. You can write PHP code directly in the command line
.

php -r "chmod('/path/to/hoge', 777)" # You can see the results immediately with the ls command!

 I intended to write it like chmod 777 /path/to/hoge, but the permissions were not actually changed.
I read the documentation and tried and failed to find the answer.

Edit the file → Save → Go to console → Run the php file → (´・ω・｀)

To be honest, repeating this process over and over is a pain, so if you can extract something and test it easily like in the example above, it's probably less work to do it from the command line

 
That's it.

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