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string compare int value trap in php

admin 11月 12, 2020 0

If string compare with an integer, php will evaluate string to integer intval() and compare it with that integer.

php

if('test' != 0) {
    echo "true";
} else {
    echo "false"; 
}
if('0test' != 0) {
    echo "true";
} else {
    echo "false"; 
}
if('1test' != 0) {
    echo "true"; // return true
} else {
    echo "false";
}