PHP 4, PHP 5, PHP 7, PHP 8
strtr - Translate characters or replace substrings
Strtr Online Tool
Code Examples

Example #1 strtr example with two arguments

Result: hello all, I said hi
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Example #2 strtr example

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Example #3 strtr behavior comparison

Result: 1001 ba01
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Example #4 of strtr

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Function strtr:

Strings Functions

Most used PHP functions