5 PHP practical functions to share

Senior PHP programmers may be familiar with them, but many PHP learners are still not familiar with some very useful functions. In this article, we list 10 useful PHP functions that you may not know but are useful. We hope they can help you.

1.highlight_string

The highlight_string() function is very useful when you want to display PHP code on the page. It can use the built-in defined syntax Highlight color highlights the PHP code you provide. This function takes two parameters, the first parameter is the string to be highlighted. If the second parameter is set to TRUE, the highlighted code will be returned.

Usage:

<?php
highlight_string(&#39; <?php phpinfo(); ?>&#39;);
?>

2.show_source

The operation of this function is similar to highlight_file(). It can display the PHP syntax highlighted file and is based on HTML Tags are syntax highlighted.

Usage:

<?php
show_source("php_script.php");
?>

3.php_check_syntax

This function can be used to check whether the PHP syntax in a specific file is correct.

Usage:

<?php
$error_message = "";
$filename = "./php_script.php";
if(!php_check_syntax($filename, &$error_message)) {
   echo "Errors were found in the file $filename: $error_message";
} else {
   echo "The file $filename contained no syntax errors";
}
?>

4.php_strip_whitespace

This function is similar to the show_source() function above, but it will delete comments and spaces in the file.

Usage:

<?php
echo php_strip_whitespace("php_script.php");
?>

5._halt_compiler

It can halt the execution of the compiler, which is helpful for embedding data in PHP scripts, like installation Files are the same.

Usage:

<?php
$fp = fopen(__FILE__, &#39;r&#39;);
fseek($fp, __COMPILER_HALT_OFFSET__);
var_dump(stream_get_contents($fp));
__halt_compiler();
?>

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