The difference between PHP trim function LTrim function RTrim function

Everyone knows that the trim () function of PHP, the LTrim () function, the RTrim () function can remove the space, so what are the different differences between the three in usage? Let me introduce you to you now.
The 1.php trim () function removes all spaces (in fact, all spaces that remove the string two times), for example:

$str = "Love 59biye"; Echo ("---". Trim ($STR). " ---");//Output---love 59biye---

The 2.php LTrim () function removes spaces to the left of the string, for example:

$str = "Love 59biye"; Echo ("---". LTrim ($STR). " ---");//Output---love 59biye---

The 3.php RTrim () function removes the space to the right of the string, for example:

$str = "Love 59biye"; Echo ("---". LTrim ($STR). " ---");//Output---love 59biye---

Well, you see their specific differences.

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