你可以
register一
tick handler：
Ticks
A tick is an event that occurs for every N low-level tickable statements executed by the parser within the declare block. The value for N is specified using ticks=N within the declare blocks’s directive section.
Not all statements are tickable. Typically,condition expressions and argument expressions are not tickable.
正如您所看到的,它不完全是“每行代码”,除非您每行只写一个可选择的语句.但它是你能得到的最接近的.
例：
declare(ticks=1);
register_tick_function(function() {
echo "tick_handler() called\n";
});
echo 'Line 1',PHP_EOL;
echo 'Line 2',PHP_EOL;
echo strtoupper('Line 3'),PHP_EOL;
tick_handler() called Line 1 tick_handler() called Line 2 tick_handler() called LINE 3 tick_handler() called
