4 useful tips when creating PHP console tools

Also, if you want to pass a string with line breaks to $argv, wrapping the string with "" or '' will work as intended.

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

<?php var_dump($argv);

 
Next, try executing the source with the string including line breaks as an argument.

php test.php hogehoge 'Enter line break' # When you execute the above command, the following will be displayed array(3) { [0] => string(8) "test.php" [1] => string(8) "hogehoge" [2] => string(22) "line break" }

 
It looks like things are going well.

Try adding color to error messages (+bonus)

If you want to add some fun, why not add color to your error messages?

On Linux, you can make the echo string colorful and change the background color.

This can be easily accomplished 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 display hogehoge in red, but I can't understand what they mean at first glance, so
I'll 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 divide it into the "hogehoge" part and the non-hogehoge part. Then, I found some sort of regularity.
It seems to be a good idea to wrap the string you want to change color in "\e[**m" or "\033[**m"].

After that, the number "31" that is attached only to the first part
is used to specify the font color.
Dividing 31 into 3 and 1, 3 specifies the font color and 1 specifies the color red.
In other words, when specifying a different font color, change 1 to 2.

I wrote that the 3 part of 31 specifies the font color, but if it becomes 4, it specifies the background color.
In other words

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

 
The above code will display the background color as red.

If you want to change both the font color and background color using a matching technique, place them next to each other with a semicolon between them.

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

 
The above code only displays a red rectangle and no text, but it accomplishes the purpose.

In addition, you can use this setting to underline, make bold, invert the font 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

 
You can also use it alone since it won't cause your eyes to flicker even if you use it inverted.

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

When you're creating a console tool, you
may come across small questions like how the execution results will be returned, or whether this way of writing will cause an error.In
such cases, there are PHP options that you can quickly try. Introducing "-r".

For example, let's say you want to change permissions.
You can quickly change it using the chmod function, but if you want to see if it works, you can write PHP code directly in the command without having to go through the trouble of writing test code.
PHP's opening tag, "

php -r "chmod('/path/to/hoge', 777)" # Get the results right away with the ls command!

 As an image, I intended to write something like chmod 777 /path/to/hoge, but the permissions are not actually changed.
I'm looking for the correct answer by reading the documentation and repeating trial and error to find out what's wrong.

Rewrite the file → Save → Move to console → Run php file → (´・ω・｀)

Honestly, it's painful to repeat this process over and over again, so if you can easily extract and test something like the example above, I think it's easier to do it from the command line.

 
That's it.

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