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The IntlChar::isJavaSpaceChar function in PHP is used to check if a character is a Java space character.

Java space characters include space, non-breaking space, carriage return, line feed, tab, and vertical tab.

Here is an example usage of the function:

php
$char = ' ';

if (IntlChar::isJavaSpaceChar($char)) {
echo "The character is a Java space character.";
} else {
echo "The character is not a Java space character.";
}


In this example, the variable $char contains a space character. The IntlChar::isJavaSpaceChar function is used to check if $char is a Java space character. If it is, the message "The character is a Java space character" is displayed. Otherwise, the message "The character is not a Java space character" is displayed.